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Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Published by Politeknik ATK Yogyakarta
ISSN : 14117703     EISSN : 27462625     DOI : https://doi.org/10.58533/8esa3597
Core Subject :
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.
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Articles 85 Documents
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UTILIZATION OF LIQUID WASTE SEDIMENT LEATHER INDUSTRI FOR CHILLI PLANTS FERTILIZER Sofwan Siddiq Abdullah
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/djn2hw13

Abstract

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.
REPROCESS AND REPAIR COW UPPER LEATHER SUEDE WITH SPRAY FINISH METHOD Sofwan Siddiq Abdullah
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/fzpydf97

Abstract

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.
EFFECT OF GELATINIZATION ACIDITY ON BIOPLASTIC SYNTHESIS OF GLUTINOUS RICE STARCH REINFORCED BY BAMBOO LEAF POWDER Uma Fadzilia Arifin
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/nbn20g12

Abstract

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.
EFFICIENCY OF WATER AND CHROME USE IN CABRETTA SHEEP TANNING PROCESS USING EXHAUSTED TANNING CHROME METHOD Akbar Izzulhaq; Mustafidah Udkhiyati; Wahyu Fajar Winata
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/mk0rvw05

Abstract

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.
THE EFFECT OF INJECTION SPEED, INJECTION PRESSURE, AND MOLD POSITION ON THE PRODUCTION OF POLYPROPYLENE (PP) LOUNGE CHAIRS Wisnu Pambudi; Muhamad Choirul Mahfudin
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/adf1c778

Abstract

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.
CALCULATION OF UNCERTAINTY VALUE IN THE SKIN THICKNESS TEST USING A THICKNESS MEASUREMENT Eko Nuraini; Prasetyo Hermawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/scnev768

Abstract

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.
INTER-LABORATORY COMPARE TEST IN THE FRAMEWORK OF INCREASING TRUST IN PHYSICS TESTING LABORATORIES OF ATK POLYTECHNIC Eko Nuraini; Prasetyo Hermawan
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/sb8vkm44

Abstract

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.
REDESIGN OF PIKACHU CASUAL BACK TO SCHOOL SHOES SAMPLES AT PT PRIMARINDO ASIA INFRASTRUCTURE Tbk BANDUNG Zain Azmi Amanullah; Anwar Hidayat
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/fgpjrd97

Abstract

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.
THE EFFECT OF COMBINATION VEGETABLE TANNING MATERIALS AND SULPHITED OIL ON THE PHYSICAL PROPERTIES OF JACKET LEATHER Heru Budi Susanto; Baskoro Ajie
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/rhvpj273

Abstract

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.
PEMANFAATAN LIMBAH KULIT SISA PRAKTIKUM DALAM PEMBUATAN BUCKET HAT Gilang A S K Ningtyas
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 24 No. 1 (2025): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/bnhhb968

Abstract

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.

Page 7 of 9 | Total Record : 85

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