Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
type: channel
description: Berkala Penelitian Teknologi Kulit, Sepatu dan Produk Kulit diterbitkan oleh Politeknik ATK Yogyakarta sebagai media penuangan dan pembahasan karya ilmiah dalam bidang ilmu perkulitan dan barang kulit, terbit dua (edisi) dalam setahun. Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit mencakup beberapa topik mengenai penyamakan kulit (enzim terapan, kimia terapan dan kimia lingkungan), produk samping kulit, teknologi karet, teknologi plastik, pengembangan mesin produksi, teknologi sepatu, dan pengembangan produk kulit yang diterbitkan oleh Politeknik ATK Yogyakarta, Indonesia. Jurnal ini juga mencakup penelitian-penelitian dari multidisiplin ilmu yang lain yang terkait dengan teknologi kulit, karet dan plastik. Berkala Penelitian Teknologi Kulit, Sepatu dan produk Kulit is a peer-reviewed, open-access journal that publishes original research articles, review articles, as well as short communication in all areas of basic and applied chemistry. Berkala Penelitian Teknologi Kulit, Sepatu dan produk Kulit covers the following topics. Arts Chemical Engineering, Chemistry and Bioengineering Engineering Industrial and Manufacturing Engineering Social Science The submitted manuscript should have relevance with Arts, Chemical Engineering, Chemistry and Bioengineering, Industrial and Manufacturing Engineering, and Social Science. Publication Frequency To fasten qualified articles to be published, Berkala Penelitian Teknologi Kulit, Sepatu dan Produk Kulit publish two issues (numbers) annually (February-August and September-January). Article Processing Charge This journal does not charge any fees for article submission, processing, or publication. All stages, from manuscript submission to the final publication, are completely free of charge.
publisher: Politek ATK Yogyakarta Press
language: en
publication name: Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
issn: 1411-7703
items: VISUAL COMPARISON OF VEGETABLE TANNED GOAT SKIN ON THE EXPERIMENTAL RESULTS OF THE FOLTIC METHOD AND THE HYDRO DIP METHOD
items: APPLICATION OF HAZARD IDENTIFICATION, RISK ASSESSMENT, AND RISK CONTROL (HIRARC) METHOD FOR RISK MANAGEMENT IN BEAM HOUSE OPERATION PRACTICUM
items: DESIGN OF LABORATORY CHEMICAL INVENTORY MANAGEMENT INFORMATION SYSTEM AT POLITEKNIK XYZ
items: SUBSTITUTION OF ACID AND REACTIVE DYESTUFF MATERIALS IN THE WET BLUE SHEEP SKIN DYEING METHOD FOR NAPA LEATHER AND SUEDE GARMENTS ON WATER WASHING RESISTANCE AS A LABORATORY MANAGEMENT EFFORTS
items: IMPLEMENTATION OF QUICK RESPONSE (QR) CODE ON SAFETY DATA SHEETS (SDS) OF CHEMICALS TO IMPROVE OCCUPATIONAL HEALTH AND SAFETY IN EDUCATIONAL LABORATORIES
items: UTILIZATION OF LEATHER WASTE FROM PRACTICUM ACTIVITIES IN THE PRODUCTION OF BUCKET HATS
items: THE EFFECT OF COMBINATION VEGETABLE TANNING MATERIALS AND SULPHITED OIL ON THE PHYSICAL PROPERTIES OF JACKET LEATHER
items: REDESIGN OF PIKACHU CASUAL BACK TO SCHOOL SHOES SAMPLES AT PT PRIMARINDO ASIA INFRASTRUCTURE Tbk BANDUNG
items: INTER-LABORATORY COMPARE TEST IN THE FRAMEWORK OF INCREASING TRUST IN PHYSICS TESTING LABORATORIES OF ATK POLYTECHNIC
items: CALCULATION OF UNCERTAINTY VALUE IN THE SKIN THICKNESS TEST USING A THICKNESS MEASUREMENT
items: THE EFFECT OF INJECTION SPEED, INJECTION PRESSURE, AND MOLD POSITION ON THE PRODUCTION OF POLYPROPYLENE (PP) LOUNGE CHAIRS
items: EFFICIENCY OF WATER AND CHROME USE IN CABRETTA SHEEP TANNING PROCESS USING EXHAUSTED TANNING CHROME METHOD
items: EFFECT OF GELATINIZATION ACIDITY ON BIOPLASTIC SYNTHESIS OF GLUTINOUS RICE STARCH REINFORCED BY BAMBOO LEAF POWDER
items: REPROCESS AND REPAIR COW UPPER LEATHER SUEDE WITH SPRAY FINISH METHOD
items: UTILIZATION OF LIQUID WASTE SEDIMENT LEATHER INDUSTRI FOR CHILLI PLANTS FERTILIZER
items: ISOLATION AND IDENTIFICATION OF STAPHYLOCOCCUS AUREUS FROM WOUNDS OF DAIRY CATTLE IN VITRO
items: ANALYSIS OF THE EFFECT OF MOLD TEMPERATURE AND MELT TEMPERATURE ON FILL TIME AND QUALITY PREDICTION OF PLASTIC PRODUCTS IN INJECTION MOLDING PROCESS USING AUTODESK MOLDFLOW ADVISOR SOFTWARE
items: IDENTIFICATION OF TIRE RUBBER FEASIBILITY WITH CNN RESNET-50 MODEL
items: THE USE OF A CROCKMETER MACHINE FOR RUBBING TEST ON PARCHMENT SKIN
items: THE EFFECT OF USING SURFACTAN TO REMOVE FATTY SPEW STAINS ON GOLF GLOVE LEATHER
items: IMPLEMENTATION OF ARTIFICIAL INTELLIGENCE ON THE DEVELOPMENT OF AUTOMATIC LEATHER PRODUCT INDUSTRIAL WASTE DETECTION SYSTEM
items: EXPLORATION OF LANTUNG WOOD LEATHER WITH DESIGN THINKING METHOD FOR PRODUCT DEVELOPMENT OF LANTUNG BENGKULU MSMEs
items: OPTIMIZATION OF CYCLE TIME AND REDUCTION OF TAILED ON TOP DEFECTS IN BOTTLE CAPS USING TAGUCHI METHOD
items: HE USE OF CROSS LINKER IN UPHOLSTERY LEATHER FINISHING COATING
items: THE EFFECT OF PIGMENT ADDITION ON TRASH BAG MADE FROM RECYCLE HDPE
items: FINANCIAL STATEMENT ANALYSIS TO EVALUATE THE FINANCIAL PERFORMANCE OF COMPANIES IN THE FOOTWEAR SUB-INDUSTRY LISTED ON THE INDONESIAN STOCK EXCHANGE
items: KAWUNG BATIK'S DESIGN IN LEATHER CLOTHING STREETWEAR STYLE AS A CULTURAL PRESERVATION EFFORT
items: UPGRADING REJECTED CRUST LEATHER INTO A BATTING GLOVE ARTICLE WITH A DIGITAL MATRIX EMBOSS MOTIF
items: THE EFFECT OF PARAMETER AND MATERIAL SETTING VARIATIONS ON PRODUCT QUALITY ON INJECTION MOULDING MACHINES
items: THE EFFECT OF PATTERN CONFORMITY ON THE USE OF SHOELAST WITH DIFFERENT HEIGHTS

VISUAL COMPARISON OF VEGETABLE TANNED GOAT SKIN ON THE EXPERIMENTAL RESULTS OF THE FOLTIC METHOD AND THE HYDRO DIP METHOD
type: item
description: This study was conducted to compare the visual results of vegetable goat skin using the foltic method and the hydro dip method. 3 sheets of vegetable goat skin were used in this experiment. Vegetable goat skin was divided into 3 treatments. Each 1 sheet for the experiment. The first vegetable goat skin was not treated as a comparison of the initial skin. The second vegetable goat skin used the foltic method and the third goat skin used the hydro dip method. The treated vegetable goat skin was then visually compared with undyed goat skin, vegetable goat skin using the foltic method, and the hydro dip method. The color results include color clarity, beauty and uniqueness of color. The results of the method study showed that vegetable goat skin before treatment was brown, plain and plural. Vegetable goat skin in the foltic treatment produced clear, bright colors, regular and unique motifs. Furthermore, vegetable goat skin with the hydro dip method visually produced opaque, unclear, faint, abstract colors, and the water media was not measurable. Water-based dyes used in hydro dip are easily mixed with water media so that the color pigments are spread and reduced in intensity, resulting in colors that appear faded, blurry and less clear. In the foltic method, appropriate dyes and a controlled application process are usually used so that the color can penetrate and blend with the skin. Conclusion, the hydro dip method and the foltic method can be applied to vegetable goat skin
subject: Articles
  topic: section
subject: Vegetable Goat Skin
  topic: keywords
subject: Foltic Method
  topic: keywords
subject: Hydro Dip Method
  topic: keywords
subject: leather
  topic: subjects
subject: chemsitry
  topic: subjects
creator: Tutik Maryati
creator: Titik Anggraini
creator: Sri Suryanti
creator: Swatika Juhana
rights: Copyright (c) 2025 Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
date: 2025-08-31
publication date: 2025-08-31
starting page: 1
ending page: 7
doi: 10.58533/m7z7yr08

APPLICATION OF HAZARD IDENTIFICATION, RISK ASSESSMENT, AND RISK CONTROL (HIRARC) METHOD FOR RISK MANAGEMENT IN BEAM HOUSE OPERATION PRACTICUM
type: item
description: Educational laboratory is a place of learning for students through observation, experimentation and practicum. Practicum activities often face the risk of danger that threatens the safety and health of students. One of the practicums with many potential hazards is the beam house operation (BHO) which is the initial stage of the leather tanning process. As an effort to identify hazards, assess risks, and control risks in the beam house operation practicum, an analysis of the Hazard Identification, Risk Assessment and Risk Control (HIRARC) was carried out. The research method is descriptive with qualitative analysis through observation and surveys of respondents from lecturers, educational laboratory administrators and students. The data obtained were then analyzed using the HIRARC method. The object of the research is the activities or processes in the beam house operation practicum for salted sheepskin. The results of the risk analysis in the BHO practicum contained 12 types of risks consisting of 6 types of low risk (50%), 4 types of moderate risk (33.33%), and 2 types of high risk (16.67%). Risk controls that can be applied to the BHO practicum include engineering control, administration, and personal protective equipment (PPE).
subject: Articles
  topic: section
subject: Laboratory
  topic: keywords
subject: HIRARC
  topic: keywords
subject: Risk Control
  topic: keywords
subject: Beam House Operation
  topic: keywords
subject: OHS
  topic: keywords
subject: leather
  topic: subjects
subject: chemical engineering
  topic: subjects
subject: chemistry
  topic: subjects
subject: management
  topic: subjects
creator: Sri Suryanti
creator: Adhy Prasetyo
rights: Copyright (c) 2025 Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
date: 2025-08-31
publication date: 2025-08-31
starting page: 8
ending page: 21
doi: 10.58533/b45b6q69

DESIGN OF LABORATORY CHEMICAL INVENTORY MANAGEMENT INFORMATION SYSTEM AT POLITEKNIK XYZ
type: item
description: The chemical inventory management system in the XYZ Polytechnic laboratory has not been optimally integrated, so real-time stock monitoring is still limited and has the potential to cause discrepancies between the amount of stock recorded and actual conditions. This inaccuracy in inventory management can hamper the smooth running of laboratory activities. This research aims to design a chemical inventory management information system using a prototype approach, which includes the stages of Communication, Quick Planning, Quick Modelling, Construction, and Deployment. The system was developed with Microsoft Access and Visual Basic for Applications (VBA) and designed with main components that include inventory recording and real-time stock monitoring. In addition, the system is also equipped with a feature to export stock data into systematic reports to support the analysis and reporting process. The results of testing the prototype show that the developed system is able to integrate the process of recording and monitoring stock in real-time, thus improving the accuracy of inventory data and efficiency in managing chemicals in the laboratory.
subject: Articles
  topic: section
subject: Chemical Inventory
  topic: keywords
subject: Information System
  topic: keywords
subject: Microsoft Access
  topic: keywords
subject: Prototype
  topic: keywords
subject: VBA
  topic: keywords
subject: Persediaan Bahan Kimia
  topic: subjects
subject: Sistem Informasi
  topic: subjects
subject: Microsoft Access
  topic: subjects
subject: Prototype
  topic: subjects
subject: VBA
  topic: subjects
creator: Mukhsalmina Mukhsalmina
creator: Adhy Prasetyo
creator: Muhammad Ikhwan
creator: Annisa Nukhikmat Al Basith
creator: Gilang Alfurqoni Surya Kusuma Ningtyas
rights: Copyright (c) 2025 Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
date: 2025-08-31
publication date: 2025-08-31
starting page: 41
ending page: 54
doi: 10.58533/ejv96543

SUBSTITUTION OF ACID AND REACTIVE DYESTUFF MATERIALS IN THE WET BLUE SHEEP SKIN DYEING METHOD FOR NAPA LEATHER AND SUEDE GARMENTS ON WATER WASHING RESISTANCE AS A LABORATORY MANAGEMENT EFFORTS
type: item
description: To test the effect of different dyeing method on chrome - leather wet blue using reactive and acid dyes. Attempts were made to obtain a dyeing method that is as a new alternative, especially for skin that require high- wash durability. It is expected that the new method with the application of reactive dyes will result in the washing of the leather resistance levels were very good compared with the conventional method using acid dyes. Methodology research using wet blue sheepskin random quality, as many as 12 pieces taken at random from the bath chrome tanning process, split into 24 parts of the back (side) . Skin re- randomized and numbered 1-24 . Number 1-12 wet blue leather is treated with a reactive dyestuff, for this kind of napa and suede garment, different colors such as black, red, blue, yellow. Skin numbers 13-24 is dyed by acid dyestuff with the same color such as black, red, blue, and yellow. Statistical analysis using the General Linear Model Univariate , with three independent variables , the type of dye , colors and type of leather. Dependent variable is washing fastness.. Analysis using SPSS 15, F test - significances at 95% confidence level. Reactive dyestuff has the resilience washing (washing fastness), different from acid dyestuff. In the test values ​​F = 346.931, and the number of significance < 0.05. Average washing durability reactive dyestuff has better washing fastness than with acid dyestuff. The black color has a lower washing resistance, and the color yellow has a higher resistance. Skin type (Napa, suede , upholstery ) have different resistance that does not wash.
subject: Articles
  topic: section
subject: Pengelolaan Laboratorium
  topic: subjects
subject: wet blue
  topic: subjects
subject: material
  topic: subjects
creator: Armila Zahra Tawarniate
creator: Tantri Fauziah
rights: Copyright (c) 2025 Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
date: 2025-08-31
publication date: 2025-08-31
starting page: 22
ending page: 28
doi: 10.58533/p9ck7k13

IMPLEMENTATION OF QUICK RESPONSE (QR) CODE ON SAFETY DATA SHEETS (SDS) OF CHEMICALS TO IMPROVE OCCUPATIONAL HEALTH AND SAFETY IN EDUCATIONAL LABORATORIES
type: item
description: T he Hazardous and Toxic Chemicals have a high risk of causing work accidents in educational laboratories. These accidents are often caused by a lack of understanding of the Safety Data Sheets (SDS). Therefore, it is proposed to implement Quick Response (QR) Code on the SDS of chemicals to facilitate easy access to SDS. Furthermore, chemical users are expected to understand how to use chemicals safely, thereby improving Occupational Health and Safety (OHS). The method for the study is Research and Development (R&D) through data collecting, compiling the summary of SDS, uploading documents, creating QR Codes, printing and attaching QR Codes, testing QR Codes and user surveis. A total of 10 types of chemicals have been implemented with QR Codes and passed the test to access the SDS quickly and easily. The results of the QR Code user survey showed an average satisfaction value of 93%. Based on the results, the implementation of QR Codes on chemical Safety Data Sheets (SDS) is an effective solution to improve Occupational Health and Safety (OHS) in educational laboratories.
subject: Articles
  topic: section
subject: QR Code
  topic: keywords
subject: Safety Data Sheets
  topic: keywords
subject: Laboratorium
  topic: keywords
subject: Bahan Kimia
  topic: keywords
subject: Keselamatan dan Kesehatan Kerja
  topic: keywords
subject: QR Code
  topic: subjects
subject: Safety Data Sheets
  topic: subjects
subject: Bahan Kimia
  topic: subjects
subject: Laboratorium
  topic: subjects
subject: Keselamatan dan Kesehatan Kerja
  topic: subjects
creator: Adhy Prasetyo
creator: Septiyana Windiastuti
rights: Copyright (c) 2025 Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
date: 2025-08-31
publication date: 2025-08-31
starting page: 29
ending page: 40
doi: 10.58533/yefw8479

UTILIZATION OF LEATHER WASTE FROM PRACTICUM ACTIVITIES IN THE PRODUCTION OF BUCKET HATS
type: item
description: Workshops or laboratories in educational units are among the producers of waste that can cause environmental problems if not managed properly. One of the duties of a Laboratory Technician (PLP) is to ensure that laboratory waste management is carried out effectively and sustainably. In practical activities involving leather testing conducted by students, waste is generated in the form of leather scraps and rejected leather, which falls under the category of practicum waste. This waste needs to be recycled through a series of treatments so it can be repurposed as material for fashion products, specifically bucket hats. The creation of the bucket hat as a result of recycling practicum leather waste is carried out using a creation method based on the Design Thinking concept, which consists of five stages: Empathize, Define, Ideate, Prototype, and Test. The process of making the bucket hat includes both manual work and machine use. This research produced a bucket hat product titled "Roboard Hat," a futuristic-style hat made from leather waste material with added used keyboard accents. The study concludes that waste generated from practicum activities can be repurposed into a fashion product with artistic value.
subject: Articles
  topic: section
subject: Waste
  topic: keywords
subject: Bucket Hat
  topic: keywords
subject: Leather
  topic: keywords
subject: Laboratory Management
  topic: keywords
subject: Waste
  topic: subjects
subject: Bucket Hat
  topic: subjects
subject: Leather
  topic: subjects
subject: Laboratory Management
  topic: subjects
creator: Gilang A S K Ningtyas
rights: Copyright (c) 2025 Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
date: 2025-08-31
publication date: 2025-08-31
starting page: 55
ending page: 66
doi: 10.58533/bnhhb968

THE EFFECT OF COMBINATION VEGETABLE TANNING MATERIALS AND SULPHITED OIL ON THE PHYSICAL PROPERTIES OF JACKET LEATHER
type: item
description: This research was aimed to determine the combination of vegetable tanning materials and Sulphited oil on the physical properties namely tensile strength, oil content, elongation, softness and shrinkage temperature and determine the factors that affect tensile strength, oil content, elongation, softness and shrinkage temperature leather tanning results. Raw hides/skins were processed up to acidification, pH was set to be 5 then tanned with the variation of vegetable tannin 15%, 17,5% and 20% respectively. Fatliquoring process used sulphited oil with variation of 12%, 15% and 18%. The jacket leather produced were tested using SNI 4593:2011. From this combination of treatment provided 9 (nine) treatment variation, each treatment was preformed triplicate. The results showed that the combination of vegetable tanning materials, 17.5% and 12% of sulphited oil was the result of variation in the optimum treatment for the leather to produce 208.29 N/mm2 tensile strength, oil content of 10.02%, 50.39% elongation and softness 5.13 mm and meets the requirements of SNI 4593: 2011 with the temperature shrinkage was at 79 oC. From the analysis of variance showed vegetable tanning material is the dominant factor affecting the tensile strength, oil conten and shringkage temperature. Sulphited oil is a factor that affects the oil content, elongation and softness.
subject: Articles
  topic: section
subject: jacket leather
  topic: keywords
subject: vegetable tanning agent
  topic: keywords
subject: sulphited oi
  topic: keywords
subject: VEGETABLE TANNING
  topic: subjects
subject: SULPHITED OIL
  topic: subjects
creator: Heru Budi Susanto
creator: Baskoro Ajie
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 297
ending page: 207
doi: 10.58533/rhvpj273

REDESIGN OF PIKACHU CASUAL BACK TO SCHOOL SHOES SAMPLES AT PT PRIMARINDO ASIA INFRASTRUCTURE Tbk BANDUNG
type: item
description: Pikachu shoes model (back to school) are casual shoes produced by PT Primarindo Asia Infrastructure Tbk. by using the Tomkins brand for the needs of school and sports activities. Results of the observations, a problem was found, namely the discomfort after being tested for walking activities. The purpose of this study is to identify the problem of discomfort in the shoe and find a solution to repair. Problem solving method used is by conducting design experiments based on ergonomic aspects of shoes, while in data collection using observation methods, interviews, documentation and literature studies. The result obtained is that the initial design of the shoe uses an inappropriate upper and bottom material, namely the upper lacks good air circulation and the outsole material is less elastic and heavy. Design experiments were carried out using mesh materials on the upper and changes in the shape of the outsole design using phylon material in combination rubber on the bottom. Economically, the calculation of the cost increase of 15% is obtained, and it is still in the category of allowing it to be marketed because it still meets the feasibility of the production cost budget.
subject: Articles
  topic: section
subject: casual shoes
  topic: keywords
subject: redesign
  topic: keywords
subject: material
  topic: keywords
subject: comfort
  topic: keywords
subject: PIKACHU CASUAL
  topic: subjects
subject: SHOES
  topic: subjects
creator: Zain Azmi Amanullah
creator: Anwar Hidayat
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 293
ending page: 296
doi: 10.58533/fgpjrd97

INTER-LABORATORY COMPARE TEST IN THE FRAMEWORK OF INCREASING TRUST IN PHYSICS TESTING LABORATORIES OF ATK POLYTECHNIC
type: item
description: One of the raw materials for footwear is Chrome tanned box leather with a thickness according to the applicable SNI quality standards. The problem with measuring skin thickness has received less attention from laboratory personnel during testing. The Quality Control Section is responsible for the implementation of quality assurance and quality control of test results. External quality control is carried out by cross-laboratory comparisons. The purpose of this research is to find out the competence of the Physical Testing laboratory as an executor in inter-laboratory comparison tests with skin thickness test parameters. The material used is cow leather. The test method uses SNI-06-7128-2005. stationary. The comparative test was carried out from June to August 2022 followed by the Physical Testing Laboratory as the executor of the activities (laboratory A), laboratories B and C. The test results obtained standard deviation for laboratory A vs B 0.1396 and laboratory A vs C 0.0795 . The t value for laboratory A vs B was 0.625 and laboratory A vs C was 1.85. Based on t table at 95% confidence level for laboratory A vs B 2.228 and laboratory Avs C 2.201, t count < from t table comparative test between laboratories is declared not significantly different or acceptable. Physical Testing laboratory personnel can be declared competent for the skin thickness test.
subject: Articles
  topic: section
subject: comparative test
  topic: keywords
subject: laboratory
  topic: keywords
subject: box skin
  topic: keywords
subject: COMPARE TEST
  topic: subjects
creator: Eko Nuraini
creator: Prasetyo Hermawan
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 287
ending page: 292
doi: 10.58533/sb8vkm44

CALCULATION OF UNCERTAINTY VALUE IN THE SKIN THICKNESS TEST USING A THICKNESS MEASUREMENT
type: item
description: The manufacture of handicraft products or footwear requires materials according to standards. One of the materials for footwear products is tanned leather, the leather requires a certain thickness according to what has been required, this concerns the comfort and aesthetic value of the product being made. Producers of leather-based crafts need to know the thickness of the leather that will be used as the raw material. The problem is that laboratory personnel in carrying out tests have not carried out or made uncertainty calculations on the test results. The aim of the research is to calculate the uncertainty value of the sample test results with the thickness parameter. The activities will be carried out from May to June 2022 at the ATK Yogyakarta Polytechnic Physical Testing Laboratory. The material used for the box shell for the test method uses SNI 06-7128-2005. The tools used were thicknesses, tables, silver ink and stationery for the test treatment procedure ten times. The results of the study yielded data with an average value of 1.081; standard deviation of 0.02165; standard uncertainty value of calibration (µK) of 0.01; standard uncertainty value of precision (µP) of 0.0125 and a combined uncertainty value of 0.1468. Conclusion the thickness of the box skin is 1.081 ± 0.1468 so that the skin sample meets the requirements of SII 06-0234-1989 on a quality standard of 0.8-1.7 mm thick.
subject: Articles
  topic: section
subject: skin
  topic: keywords
subject: testing
  topic: keywords
subject: uncertainty
  topic: keywords
subject: UNCERTAINTY
  topic: subjects
subject: THICKNESS
  topic: subjects
creator: Eko Nuraini
creator: Prasetyo Hermawan
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 279
ending page: 286
doi: 10.58533/scnev768

THE EFFECT OF INJECTION SPEED, INJECTION PRESSURE, AND MOLD POSITION ON THE PRODUCTION OF POLYPROPYLENE (PP) LOUNGE CHAIRS
type: item
description: Injection molding is making products made from plastic materials through melted plastic and then injected into a mold or mold. The plastic lounge chair is made of polypropylene (PP) by injection molding. In the injection molding process, there are parameters of injection speed, pressure, and molding position. This study aims to determine the effect of injection speed, pressure, and mold position. Injection speed, injection pressure, and improper mold position can produce a lounge chair with short-shot defects. Short-shot defects cannot be repaired but must be recycled by chopping them up to be reused as additional material for producing plastic products; this will increase operational costs. Efforts to reduce short shots can be done by changing the speed parameter settings, injection pressure, and mold position. Plastic lounge chairs, according to standards, were obtained by inverted mold position and injection speed settings in zones 1, 2, 3, 4, and 5 of 70, 60, 50, 45, and 30 in mm/s units. The injection pressures are 95, 85, 75, 65, and 55 bar.
subject: Articles
  topic: section
subject: injection molding
  topic: keywords
subject: short shot
  topic: keywords
subject: injection pressure
  topic: keywords
subject: injection speed
  topic: keywords
subject: mold position
  topic: keywords
subject: INJECTION SPEED
  topic: subjects
subject: POLYPROPYLENE
  topic: subjects
creator: Wisnu Pambudi
creator: Muhamad Choirul Mahfudin
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 272
ending page: 278
doi: 10.58533/adf1c778

EFFICIENCY OF WATER AND CHROME USE IN CABRETTA SHEEP TANNING PROCESS USING EXHAUSTED TANNING CHROME METHOD
type: item
description: This study aims to make chromium and water more efficient in the tanning process. The methods used include water efficiency from 100% to 50% and chromium reduction from 6% to 4% using exhausted chrome tanning method. The raw material used is grade 6 pikel sheepskin and the auxiliary chemical used is acrylic copolymer. The tests carried out were organoleptic, physical and chromium content in the waste. Organoleptic and physical tests showed that the condition of slackness, and the suitability of color on the crust of the pearl white cabretta article had met consumer purchasing standards. In the results of physical testing of samples using the exhausted chrome tanning method, almost all of them meet the test standards from SII-0943-84. Waste testing showed that the use of the efficiency method had a significant decrease in the amount of total chromium, from 757.35 mg/L to 487.80 mg/L.
subject: Articles
  topic: section
subject: cabretta
  topic: keywords
subject: tanning
  topic: keywords
subject: exhausted
  topic: keywords
subject: chrome
  topic: keywords
subject: EFFICIENCY OF WATER AND CHROME
  topic: subjects
subject: CABRETTA
  topic: subjects
subject: TANNING PROCESS
  topic: subjects
creator: Akbar Izzulhaq
creator: Mustafidah Udkhiyati
creator: Wahyu Fajar Winata
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 265
ending page: 271
doi: 10.58533/mk0rvw05

EFFECT OF GELATINIZATION ACIDITY ON BIOPLASTIC SYNTHESIS OF GLUTINOUS RICE STARCH REINFORCED BY BAMBOO LEAF POWDER
type: item
description: Bioplastic is organic-based plastics that offers eco-friendly and safe for human health properties. The plastic versatility in life requires the sustainable development of bioplastic synthesis to be carried out to produce bioplastics that can replace the function of plastics. One alternative for bioplastic synthesis is to produce biocomposite of glutinous rice starch reinforced by bamboo leaf powder. The parameters of bioplastic synthesis process have important role to produce bioplastics with certain characteristics. This research aims to study the effect of gelatization acidity on bioplastics synthesis from glutinous rice flour reinforced by bamboo leaf powder. The gelatinization process in bioplastic production was carried out under various acidity degree (pH 3, 4, 5, 6, and 7). The results showed that the recommended gelatinization process was under acidic conditions (pH 5) to obtain viscosity value was 208 cm2/s, water content was 34.27% and density was 1.326 g/mL. In addition, the pH value of 5 in gelatinization process also obtained tensile strength was 3.118 MPa and elongation percentage was 36.111% of bioplastic. Therefore, it can be concluded that the acidity of the gelatinization process affects the quality of the bioplastic produced.
subject: Articles
  topic: section
subject: acidity degree
  topic: keywords
subject: bioplastic
  topic: keywords
subject: glutinous flour
  topic: keywords
subject: bamboo leaf powder
  topic: keywords
subject: BIOPLASTIC
  topic: subjects
subject: BAMBOO LEAF POWDER
  topic: subjects
creator: Uma Fadzilia Arifin
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 255
ending page: 264
doi: 10.58533/nbn20g12

REPROCESS AND REPAIR COW UPPER LEATHER SUEDE WITH SPRAY FINISH METHOD
type: item
description: Upper leathers have many types of leather articles likes nappa leather upper, sports shoe upper, suede upper leather and others. Suede upper leather is upper leather that has own charm because have more fashionable nap. Making suede leather more difficult because the raw materials used in this process is the upper suede leather raw material that does not pass because the color does not meet customer desires (leather from industrial leather stock). The basic color of suede skin is absolute produced through Post Tanning process. Beside the color, a feeling touch is also expected in upper suede leather. Suede skin repair process done in two ways: wet process (Post Tanning) and spray finish method. Spray finish method can save cost and time in repairing suede leather. The process of color and quality improvement is done with the finishing process so as to get suede leather in accordance with the wishes. The chemicals used in this process are: Water, metal complex dyestuff, 1441 UR, Amollan IP and Rosilk TM 2000. Suede skin repair process using spray finish method. The upper suede leathers are tested by organoleptic test. The results of this study obtained leather upper suede leathers have met the standards.
subject: Articles
  topic: section
subject: upper leather
  topic: keywords
subject: suede
  topic: keywords
subject: spray finish
  topic: keywords
subject: COW UPPER
  topic: subjects
subject: FINISH METHOD
  topic: subjects
creator: Sofwan Siddiq Abdullah
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 245
ending page: 254
doi: 10.58533/fzpydf97

UTILIZATION OF LIQUID WASTE SEDIMENT LEATHER INDUSTRI FOR CHILLI PLANTS FERTILIZER
type: item
description: The purpose of this study was to utilize solid waste from wastewater treatment sludge for red chili fertilizer by finding the proportion/ratio of solid waste components with soil to obtain the most optimal composition. The materials used are solid waste sediment leather tannery, soil, chili seedlings, pesticides, and water. The tools used are plant pots (pots made of clay with a diameter of ± 25 cm and a height of ± 20 cm). The method used was planting red chili seeds on 6 types of planting media, namely control pots, 1,2,3,4,5 pot which were sequentially controlled (without solid waste), and the ratio of solid waste: soil with a ratio of 1:2, 1: 3, 1:4, 1:5, 1:6. The results of the data obtained were analyzed using a T test and completely random design. furthermore, duncan test was conducted to determine the best dose (ratio) for chili plants if previously (in the unidirectional variance test) there was a ratio effect. The results obtained were pots 1, 2, 4 had a higher plant height than the control. Pots 1,2,3,4 had more leaves than the control. The conclusion that can be obtained is that the solid waste sediment on chili planting media affects height increase, number of chili leaves, and quantitatively not all of them have a significant effect. Giving solid waste sediments with a ratio of 1: 3 showed the fastest increase in height and number of leaves.
subject: Articles
  topic: section
subject: liquid waste deposit
  topic: keywords
subject: chili plants
  topic: keywords
subject: fertilizer
  topic: keywords
subject: LIQUID WASTE
  topic: subjects
subject: FERTILIZER
  topic: subjects
creator: Sofwan Siddiq Abdullah
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 235
ending page: 245
doi: 10.58533/djn2hw13

ISOLATION AND IDENTIFICATION OF STAPHYLOCOCCUS AUREUS FROM WOUNDS OF DAIRY CATTLE IN VITRO
type: item
description: The skin is the largest organ of the body that can be infection. One of the causes of infections is microorganisms. The presence of Staphylococcus aureus on the skin of dairy cattle can affect the quality of leather. This research was conducted to isolate and identify S. aureus from the skin of injured dairy cattle. The sample was taken from a dairy farm in Surabaya. Isolation of S. aureus was carried out using NA and MSA selective media, while characterization was carried out using gram staining, catalase test, and coagulase test. The research results showed that samples isolated from wounds on the skin of dairy contained S. aureus. Gram staining test showed gram positive bacteria with coccus morphology and clustered arrangement. The catalase test was positive with the formation of H2O and O2. Catalase test was indicated by the formation of coagulation or clots in the blood plasma. These results indicated that the skin with contains S. aureus bacteria which can cause infection so that it can affect the quality of the skin to be tanned.
subject: Articles
  topic: section
subject: staphylococcus aureus
  topic: keywords
subject: gram positif
  topic: keywords
subject: katalase
  topic: keywords
subject: koagulase
  topic: keywords
subject: ISOLATION
  topic: subjects
subject: IN VITRO
  topic: subjects
creator: Naimah Putri
creator: Eka Legya
creator: Mochammad Charis Hidayahtullah
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 228
ending page: 234
doi: 10.58533/yyyr7t18

ANALYSIS OF THE EFFECT OF MOLD TEMPERATURE AND MELT TEMPERATURE ON FILL TIME AND QUALITY PREDICTION OF PLASTIC PRODUCTS IN INJECTION MOLDING PROCESS USING AUTODESK MOLDFLOW ADVISOR SOFTWARE
type: item
description: This study aims to determine the effect of mold temperature and melt temperature on fill time and quality prediction of tablespoon products. This product is made of plastic with Polystyrene (PS) product material and is produced by the injection molding method. This research was conducted using Autodesk Moldflow Advisor software. From the results of this study, it is known that the best parameter setting among the twelve data obtained is at a mold temperature of 55°C and melt temperature of 220°C with a fill time of 0.2169 s and a high quality prediction of 13.80%, a medium value of 86, 20%, and a low value of 0.00%, because the quality of the resulting product is better and the production time is smaller. So that it can make the production process more effective and efficient
subject: Articles
  topic: section
subject: injection molding
  topic: keywords
subject: polymer
  topic: keywords
subject: mold temperature
  topic: keywords
subject: melt temperature
  topic: keywords
subject: fill time
  topic: keywords
subject: quality prediction
  topic: keywords
subject: EFFECT
  topic: subjects
subject: MOLD TEMPERATURE AND MELT TEMPERATURE
  topic: subjects
subject: INJECTION MOLDING PROCESS
  topic: subjects
creator: Midarto Dwi Wibowo
creator: Kusumawati Wahyuningsih
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 218
ending page: 227
doi: 10.58533/1henwh39

IDENTIFICATION OF TIRE RUBBER FEASIBILITY WITH CNN RESNET-50 MODEL
type: item
description: In this study, the authors designed an algorithm based on a convolutional neural network that is capable of automatically classifying tire rubber eligibility according to the appearance of the tire on the tire image. The proposed algorithm will be built through several stages as follows. In the first stage, tire image acquisition will be carried out which will be the input of the designed algorithm. Furthermore, the acquired image will be divided into two sets, namely training and testing sets. The training set contains tire images that will be used at the training stage of several convolutional neural network architectures to be able to and classify them to the appropriate level of feasibility. The training phase will be carried out in a number of epohs, and at each epoh, the cross entropy loss function value will be calculated which expresses the performance of the convolutional neural network architecture in classifying tire images. In this study, the author has designed an algorithm based on deep learning that is capable of automatically classifying tire eligibility. The proposed algorithm has been built through several stages such as tire image acquisition, training of several CNN models, especially ResNet-50. The CNN architecture test is trained to classify tire images from the test set. In addition, the accuracy value has also been calculated which shows the percentage of the number of tire images that are successfully classified correctly to the total number of tire images in the test set, which is an accuracy of 88.31%.
subject: Articles
  topic: section
subject: rubber
  topic: keywords
subject: tire
  topic: keywords
subject: classification
  topic: keywords
subject: TIRE RUBBER
  topic: subjects
subject: CNN RESNET-50 MODEL
  topic: subjects
creator: Latifah Listyalina
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 210
ending page: 217
doi: 10.58533/xrbhhm62

THE USE OF A CROCKMETER MACHINE FOR RUBBING TEST ON PARCHMENT SKIN
type: item
description: One of the small industries that survives and needs to be developed is the shadow puppet industry. The shadow puppet industry uses parchment skin as the main raw material. As a laboratory institution, the author tested the quality of parchment skin dye paint for shadow puppet using a crockmeter machine. The test is carried out by adding an auxiliary material in the form of ethylene glycol to the dye paint which is expected to improve the quality of the rubbing resistance of the dye paint on the shadow puppets. In this test the author uses parchment skin from sun-dried buffalo skin with a transparent color and an even thickness of the skin and a large cross-sectional area so that no part is wasted. Furthermore, the parchment skin surface was sanded before staining. This sanding aims to level the parchment skin surface and remove the remaining collagen, protein and fat. The test was carried out using 3 samples. Sample I used coloring materials (mowilex paint, foxputih glue, water and finishing using mowilex clear). Sample II uses coloring materials (mowilex paint, white fox glue, water, Ethylen Glycol and finishing using mowilex clear). Sample III uses dyes (mowilex paint, white fox glue, water, Ethylen Glycol, finishing using mowilex clear and the addition of a clearing process using a sunlight wetting agent. From the experiments and tests carried out, better results were obtained for the use of Ethylen Glycol in the coloring and also the clearing process to improve the color quality of the wayang kulit products produced.
subject: Articles
  topic: section
subject: wayang kulit
  topic: keywords
subject: ethylen glycol
  topic: keywords
subject: CROCKMETER
  topic: subjects
creator: Muhammad Ikhwan
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 202
ending page: 209
doi: 10.58533/31jdyb28

THE EFFECT OF USING SURFACTAN TO REMOVE FATTY SPEW STAINS ON GOLF GLOVE LEATHER
type: item
description: Fatty spew is a stain found in leather that has been tanned with chrome. The appearance of fatty spew is caused by the content of free fatty acids which is too high. The purpose of this experiment was to determine the effect of using surfactant as a washing agent in removing fatty spew stains on golf glove leather. The raw materials used were 2 sheets of chrome tanned crust measuring 11 sqft with a weight of 206 g and a shaving thickness of 0.4-0.5 mm. The process carried out is by washing using a washing agent in the form of a surfactant as much as 0.6% of the weight of the skin. Washing was carried out for 30 minutes using a process drum. The results of the washing showed that fatty spew stains on the crust skin obtained maximum results after washing there was a slight change in the surface of the skin that felt a little rough, so additional polishing treatment was needed. The conclusion obtained is that the use of surfactants obtains maximum results in removing fatty spew stains on the crust skin.
subject: Articles
  topic: section
subject: crust
  topic: keywords
subject: fatty spew
  topic: keywords
subject: golf glove and surfactan
  topic: keywords
subject: SURFACTAN
  topic: subjects
subject: FATTY SPEW
  topic: subjects
creator: Selvyan Ellenika Putri
creator: Elis Nurbalia
creator: Emiliana Anggriyani
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 196
ending page: 210
doi: 10.58533/8dyamp60

IMPLEMENTATION OF ARTIFICIAL INTELLIGENCE ON THE DEVELOPMENT OF AUTOMATIC LEATHER PRODUCT INDUSTRIAL WASTE DETECTION SYSTEM
type: item
description: Rapid globalization has led to the growth of a significant amount of waste, including in the industry. Due to the considerable amount of growth of waste every year, effective and efficient waste management is needed to protect our environment. In the leather product industry, waste management is strongly important since it may have a significant impact to the employee and production process. Regarding those issues, waste management technology is considered proposed in order to solve those problems. Current research reported the outstanding work of implementing artificial intelligence for detecting and recognizing industrial waste. Artificial intelligence was proven to be a highly recommended approach that is able to classify several waste types with outstanding performance. Regardless of those facts, artificial intelligence still remains several hurdles, such as the high computational demands, especially for deep learning networks. Regarding the mentioned issue, we proposed a more proper deep learning network for recognizing industrial waste. In this research work, we use Single Shot Detector (SSD) to recognize and classify industrial waste. Our proposed solution was performed in the TrashNet dataset and Waste Picture dataset. Our proposed solution successfully achieve mAP of 0.8813, accuracy of 0,9795, precision of 0,9985 and recall of 0,9693 in the training process. Whereas, in the testing process we achieve average accuracy of 0,8254. According to those results, we can conclude that our proposed solution is suitable for industrial waste detection and has potential to be implemented as an embedded system for recognizing industrial waste automatically.
subject: Articles
  topic: section
subject: artificial intelligence
  topic: keywords
subject: deep learning
  topic: keywords
subject: automatic industrial waste detection
  topic: keywords
subject: ARTIFICIAL INTELLIGENCE
  topic: subjects
subject: LEATHER PRODUCT
  topic: subjects
creator: Eka Legya
creator: Mochammad Charis Hidayahtullah
creator: Naimah Putri
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 184
ending page: 195
doi: 10.58533/bggd2f46

EXPLORATION OF LANTUNG WOOD LEATHER WITH DESIGN THINKING METHOD FOR PRODUCT DEVELOPMENT OF LANTUNG BENGKULU MSMEs
type: item
description: Indonesia is one of the countries that have contributed to the apparel, leather, and textile industry in the international market. Not only that, but Indonesian MSME handicrafts are also one of the commodities that can increase the country's foreign exchange, one of which is the lantung bark craft from Bengkulu. However, the creative industry is constantly facing competition with the entry of cheap products from China that get easy access with the increasing e-commerce technology. Providing value for the Lantung Bengkulu MSME products to compete locally and globally, one of the steps is to apply the Design Thinking Method and take the distinctive character of the stylized Serawai Tribe Weaving in the exploration process. The results of this study have obtained data that 47 Bengkulu women consumers as much as 89.4% like the results of the re-design and exploration of lantung shoes that have been designed. In determining the selling price of MSME Lantung Bengkulu should also set a price range of Rp. 110.000 to Rp. 500.000 because it corresponds to the purchasing power of female consumers in Bengkulu. The results of this study directly contribute to providing product value to the typical Bengkulu Lantung MSMEs. The Design Thinking method has been successfully increasing the value of the Lantung Bengkulu MSME products, this method can be applied to similar research to develop local MSMEs in Indonesia.
subject: Articles
  topic: section
subject: lantung
  topic: keywords
subject: women's footwear
  topic: keywords
subject: design thinking method
  topic: keywords
subject: craft
  topic: keywords
subject: bengkulu MSMEs
  topic: keywords
subject: LANTUNG
  topic: subjects
subject: LEATHER
  topic: subjects
creator: Mochammad Charis Hidayahtullah
creator: Eka Legya
creator: Yuafni
creator: Sugiyanto
creator: Naimah Putri
creator: Fauzi Ashari
creator: Latifah Listyalina
creator: Wahyu Ratnaningsih
rights: Copyright (c) 2022
date: 2024-12-16
publication date: 2024-12-16
starting page: 170
ending page: 184
doi: 10.58533/1fp7hf54

OPTIMIZATION OF CYCLE TIME AND REDUCTION OF TAILED ON TOP DEFECTS IN BOTTLE CAPS USING TAGUCHI METHOD
type: item
description: The purpose of this study is to determine the optimal cycle time and reduced defects of tailed on top in bottle cap products. Defects of tailed on top are defects in the form of residual plastic material that hardens at the top of the bottle cap where the material enters when injected. The method used in this final project was to conduct an experimental design using orthogonal array by varying the influential parameters and ANOVA calculation. Furthermore, this paper also calculated the Taguchi method by using Minitab 18 software. The result show that the optimal condition is combination parameters cooling time of 8 seconds, injection time of 2.10 seconds and hot runner nozzle temperature of 230oC produces a cycle time value of 17,11 seconds and percentage defects 1,56%.
subject: Articles
  topic: section
subject: cycle time
  topic: keywords
subject: tailed on top defect
  topic: keywords
subject: injection molding
  topic: keywords
subject: taguchi method
  topic: keywords
subject: optimization
  topic: subjects
subject: cycle tima
  topic: subjects
subject: bottle caps
  topic: subjects
subject: taguchi method
  topic: subjects
subject: tailed on top
  topic: subjects
subject: injection molding
  topic: subjects
subject: defect
  topic: subjects
creator: Nanda Pratiwi
creator: Diana Ross Arief
creator: Herry Suseno
creator: Adam Dio Zaidan Dhuha
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 313
ending page: 323
doi: 10.58533/ka6e2a97

HE USE OF CROSS LINKER IN UPHOLSTERY LEATHER FINISHING COATING
type: item
description: Leather upholstery must have good rub resistance, adhesion, and flexing resistance to be able for a long time. This study aims to determine the correct amount of cross linker use to obtain the good rub resistance, adhesion, and flexing resistance upholstery of the leather upholstery finishing coat. Crust leather, adhesive solvent, diluent solvent, penetrator, medium light polyurethane, light polyurethane, aliphatic polyurethane, cross linker, spray gun, flex meter, rubbing fastness tester, and grey scale are used as material. Upholstery leather finishing consist of base, medium and top coat. The method is addition of 2, 3, and 4% cross linker from the total of top coat composition. The result of wet rubbing resistance test are very faded (value=1) when using 2% cross linker, medium faded (value=3) when using 3% cross linker, very no faded (value=5) when using 4% cross linker. The dry rubbing resistance of each treatment showed no difference. Adhesion value (≤12.0 N) and flexing resistance (no crack) for all treatment met the requirement. It can be concluded that the use of a cross linker of 4% in the top coat finishing produces the best test value.
subject: Articles
  topic: section
subject: cross-linker
  topic: keywords
subject: rub resistance
  topic: keywords
subject: finishing coat
  topic: keywords
subject: finishing
  topic: subjects
subject: leather
  topic: subjects
subject: cross-linker
  topic: subjects
subject: upholstery
  topic: subjects
subject: coating
  topic: subjects
subject: crust leather
  topic: subjects
subject: physical characteristics
  topic: subjects
creator: Putri Endah Kurnia
creator: Laili Rachmawati
creator: Dina Mariana Uli Lubis
creator: Sofwan Siddiq Abdullah
creator: Fadzkurisma Robbika
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 305
ending page: 312
doi: 10.58533/es0t0273

THE EFFECT OF PIGMENT ADDITION ON TRASH BAG MADE FROM RECYCLE HDPE
type: item
description: Trash bag is a product of plastic film in the form of bubbles which is produced using extrusion blown film and coextrusion blown film machines. Trash bags have a variety of colors and sizes. The color of the trash bag comes from pigment additives. The addition of pigments to trash bags is not only to increase their aesthetic value, but can also have an impact on the mechanical properties and water resistance of finished goods. Therefore, experiments were carried out to make trash bags with variations in the addition of pigments (0%, 5%, 10%, 15%), HDPE recycle (60%), LLDPE recycle (40%), desiccant (5%). The experiment was conducted at PT Sang Plastik Indonesia. The purpose of the experiment was to find out the process of making trash bags, the exact formulation, and the mechanical properties and resistance to water. The process of making trash bags uses an extrusion blown film machine at a temperature of 190-195°C. The process of testing the mechanical properties consisting of tensile strength and tear strength was carried out six times for each trash bag sample using a universal testing machine, while the water resistance test was carried out by soaking each sample for 24 hours. The results of the trash bag tensile strength test with the addition of 0% pigment was 6.8 MPa, 5% pigment was 6.7 MPa, 10% pigment was 6.2 MPa, and 15% pigment was 6.1 MPa. The results of the tear strength test of the trash bag with the addition of 0% pigment was 1.8 N, 5% pigment was 1.7 N, 10% pigment was 1.6 N, and 15% pigment was 1.3 N. The results of the trash bag water resistance test with the addition of 0% pigment was 98.10%, 5% pigment is 99.13%, 10% pigment is 98.39%, and 15% pigment is 99.66%.
subject: Articles
  topic: section
subject: trash bag
  topic: keywords
subject: pigment
  topic: keywords
subject: mechanical properties
  topic: keywords
subject: water resistance
  topic: keywords
subject: pigment
  topic: subjects
subject: trash bag
  topic: subjects
subject: recycle hdpe
  topic: subjects
subject: mechnical properties
  topic: subjects
subject: tensile strength
  topic: subjects
subject: tear strength
  topic: subjects
creator: Rifan Gerby
creator: Indri Hermiyati
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 296
ending page: 304
doi: 10.58533/aye7a026

FINANCIAL STATEMENT ANALYSIS TO EVALUATE THE FINANCIAL PERFORMANCE OF COMPANIES IN THE FOOTWEAR SUB-INDUSTRY LISTED ON THE INDONESIAN STOCK EXCHANGE
type: item
description: Financial reports are needed as accountability for the financial management carried out by the company, which provides various information that is useful for evaluating company performance. The study aims to identify and analyze financial ratios in the footwear sub-industry listed on the Indonesia Stock Exchange to obtain an overview of the company's financial performance. The data used in this study are secondary data in the form of company financial reports. Purposive sampling is used in this study, namely using the footwear industry sub-sector consisting of two companies, namely PT Sepatu Bata, Tbk and PT Primarindo Asia Infrastructure, Tbk. The data analysis method used is a comparative descriptive method, namely by describing and comparing certain characteristics or variables to obtain an overview and understanding of the problems studied. By using financial ratio analysis in the form of liquidity ratios and solvency ratios, it is found that both companies have liquidity ratios that tend to decrease as indicated by the calculation of the current ratio and acid test (or quick) ratio whose values ​​tend to decrease during the observation period, indicating that the company's ability tends to decrease to settle its short-term obligations. The solvency ratios used are the debt-to-equity ratio and the debt-to-total-assets ratio which show calculation results that tend to increase during the observation period, indicating that the company's financing carried out by creditors tends to increase in amount.
subject: Articles
  topic: section
subject: footwear industry
  topic: keywords
subject: current ratio
  topic: keywords
subject: acid test (quick) ratio
  topic: keywords
subject: debt to equity ratio
  topic: keywords
subject: debt to total assets ratio
  topic: keywords
subject: financial performance
  topic: subjects
subject: foowear industry
  topic: subjects
subject: indonesian stock
  topic: subjects
subject: financial ratio
  topic: subjects
subject: acid test
  topic: subjects
creator: Dina Mariana Uli Lubis
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 287
ending page: 295
doi: 10.58533/ja5md949

KAWUNG BATIK'S DESIGN IN LEATHER CLOTHING STREETWEAR STYLE AS A CULTURAL PRESERVATION EFFORT
type: item
description: The era of globalization has caused foreign products/cultures to enter Indonesia, this has made local batik and leather crafts ready to compete and develop. This research aims to preserve kawung batik culture and leather crafts so that they are competitive in local and international markets. The Research and Development (R&D) method is considered the most appropriate because it consists of research, planning, and product development stages. The results of the research stage selected kawung beton batik because it has the best philosophy and aesthetics. Kawung beton has a philosophy and awareness that good deeds should not be displayed/flexed because they can cause body dysmorphia/anxiety in society. The analysis results at the planning and product development stage showed that wearable and streetwear-style clothing products are by the character of Gen Z consumers who are brave, assertive, rebellious, indifferent, and prioritize comfort. This recommended design for a combination of leather and batik materials is liked by Gen Z consumers so that efforts to preserve culture and leather MSMEs can further develop and compete in the market.
subject: Articles
  topic: section
subject: kawung batik
  topic: keywords
subject: leather
  topic: keywords
subject: cultural preservation
  topic: keywords
subject: design
  topic: keywords
subject: streetwear fashion
  topic: keywords
subject: batik kawung
  topic: subjects
subject: leather clothing
  topic: subjects
subject: streetwear
  topic: subjects
subject: cultural preservation
  topic: subjects
creator: Mochammad Charis Hidayahtullah
creator: Eka Legya Frannita
creator: Intan Nurhayati
creator: Ahsan Afriza Rahmadani
creator: Desy Karina Putri
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 278
ending page: 286
doi: 10.58533/f12skq58

UPGRADING REJECTED CRUST LEATHER INTO A BATTING GLOVE ARTICLE WITH A DIGITAL MATRIX EMBOSS MOTIF
type: item
description: The aim of the research is to upgrade goat crust leather which was declared rejected to be made into batting glove articles with digital matrix embossed motifs, so as to increase the quality and selling value of the leather. Rejected leather is leather that does not meet the specifications of the intended article, for example defects, thickness and area. The digital matrix motif has a 3D pattern, so apart from adding aesthetic value, the digital matrix application on batting gloves also increases user comfort. The raw materials used were 4 pieces of crust reject leather which had wrinkles, ticks, fleas and coarse grain defects. Repairs were carried out using 2 methods, namely 3 skins using method A (re-process retanning, finishing, re-fatliquoring) and 1 skin using method B (finishing, re-fatliquoring). Testing is carried out physically. The results of physical testing showed that skin using method B was better in the elongation test (52.3%>49.5%) and softness (6.1mm>5.4mm). The results of the skin color fastness test using method A have better scores, namely 4/5 for dry paint rubbing resistance (staining and change in color) and 3/4 (staining and change in color) for wet paint rubbing resistance.
subject: Articles
  topic: section
subject: batting glove
  topic: keywords
subject: finishing
  topic: keywords
subject: re-fatliquoring
  topic: keywords
subject: retanning
  topic: keywords
subject: upgrading
  topic: keywords
subject: rejected crust
  topic: subjects
subject: leather
  topic: subjects
subject: batting glove
  topic: subjects
subject: digital matrix
  topic: subjects
creator: Erlinda Rahma Damayanti
creator: Nais Pinta Adetya
creator: Ragil Yuliatmo
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 269
ending page: 277
doi: 10.58533/efwa9j50

THE EFFECT OF PARAMETER AND MATERIAL SETTING VARIATIONS ON PRODUCT QUALITY ON INJECTION MOULDING MACHINES
type: item
description: Injection Molding is one of the production processes that is widely used to produce various plastic products. As with other fabrication methods, plastic products produced through the Injection Molding process have the potential to have product defects (defects). This research was carried out to improve the quality of the products produced. The research was conducted in four experiments using HDPE Recycle, HDPE Original, PP and ABS plastic materials with different parameter settings. The parameter settings used include temperature, Injection Speed, Injection Pressure, Holding Speed, Holding Pressure, Rotation Speed, Back Pressure, Plastification Speed, Plastification Pressure, Plastification Potition. In the first experiment using HDPE Recycle material, data was obtained in the form of product defects in Short Shot, Flow Mark, Sink Mark, Warpage. In the second experiment, using Original HDPE material which has better quality than HDPE Recycle because its purity is still maintained, data in the form of defects in Warpage products was obtained. In the third experiment using PP material, Flow Mark and Warpage defects were found in the resulting product. In the fourth experiment using ABS material, defects in Short Shot and Flow Mark were found. From this study, it is known that each material has different properties and qualities so that the setting of injection machine parameters must be adjusted to the material used. From the parameters used in each of these experiments, product defects that arise are also known so that the right solution can be found to overcome the product defect.
subject: Articles
  topic: section
subject: injection molding
  topic: keywords
subject: product defects
  topic: keywords
subject: hdpe
  topic: keywords
subject: pp
  topic: keywords
subject: abs
  topic: keywords
subject: parameter and material setting
  topic: subjects
subject: product quality
  topic: subjects
subject: injection moulding
  topic: subjects
subject: defect
  topic: subjects
subject: recycle hdpe
  topic: subjects
subject: hdpe
  topic: subjects
creator: Muhammad Ikhwan
creator: Diana Yuliastuti
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 259
ending page: 268
doi: 10.58533/kwn7xr53

THE EFFECT OF PATTERN CONFORMITY ON THE USE OF SHOELAST WITH DIFFERENT HEIGHTS
type: item
description: Pattern is an important component in the shoe making process. The suitability of the pattern in making shoes will affect the comfort of wearing when the shoes are used. This is because the pattern is made from a shoe last, so the pattern takes the size details from the shoe last used. However, in practice, patterns are sometimes used to make shoes of different sizes. Based on this problem, it is necessary to conduct research regarding the application of pattern conformity to the use of shoe last that have different heights. The method used in this research is an experimental method. The results of this research are that patterns that do not match will be difficult to use in shoe last that have differences in heel height. So that the use of a pattern that matches the shoe last when making shoes must match the shoe last used in making the pattern.
subject: Articles
  topic: section
subject: pattern
  topic: keywords
subject: shoe last
  topic: keywords
subject: difference in heel height
  topic: keywords
subject: pattern effect
  topic: subjects
subject: shoelast
  topic: subjects
subject: height
  topic: subjects
subject: conformity
  topic: subjects
creator: Abimanyu Yogadita
creator: Sanjaya Nugraha
creator: Mianto Rochmadi
rights: Copyright (c) 2024
date: 2024-12-16
publication date: 2024-12-16
starting page: 251
ending page: 258
doi: 10.58533/2jvbwd33