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All Journal Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Swatika Juhana
Politeknik ATK Yogyakarta

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PERBANDINGAN VISUAL KULIT KAMBING SAMAK NABATI PADA HASIL EKSPERIMEN METODE FOLTIK DAN METODE HYDRO DIP Tutik Maryati; Titik Anggraini; Sri Suryanti; Swatika Juhana
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/m7z7yr08

Abstract

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
PENAMBAHAN DISPERSING AGENT PADA PROSES PASCA TANNING UNTUK MENGURANGI KADAR COD             (Chemical Oxygen Demand) Sofwan Siddiq Abdullah; Renita Wahyu Meydasari; Swatika Juhana; Fadzkurisma Robbika
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 24 No. 2 (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/sbnkd059

Abstract

In the leather tanning industry, post-tanning process generates liquid waste. One of the parameters of liquid waste is Chemical Oxygen Demand (COD). The chemicals used in the post-tanning process have an impact on COD levels of the wastewater. The purpose of this study is to investigate the addition of a dispersing agent during the post-tanning stage to reduce the Chemical Oxygen Demand (COD) content in the process effluent. Based on the stages of post-tanning, the fatliquoring fixation process contains a large amount of organic substances, which is indicated by the high COD value. The higher the COD, the lower the dissolved oxygen content in water. Elevated COD levels can have adverse impacts on the environment. The method used in this study was a trial involving the addition of a dispersing agent during the post-tanning process. COD measurements were carried out using a UV-Vis spectrophotometer. The addition of 10% dispersing agent reduced COD levels from 62,200 mg/L to 56,550 mg/L (reduction of 9.08%). The results of the experiment demonstrate that the addition of a dispersing agent in the post-tanning process can reduce the wastewater treatment load in the leather tanning industry.
IDENTIFICATION OF HALAL CRITICAL CONTROL POINTS IN THE LEATHER TANNING PROCESS FOR HALAL LEATHER MATERIAL PRODUCTION Dian Nur Amalia; Swatika Juhana
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 25 No. 1 (2026): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/3k5zpy95

Abstract

The expansion of the halal concept beyond the food and beverage sector has increased attention toward halal compliance in non-edible industries, including leather manufacturing. Leather processing involves multiple stages, namely beamhouse operations, tanning, post-tanning, and finishing, all of which must comply with the Halal Product Assurance System (SJPH). Within this framework, halal assurance encompasses not only the final product but also raw materials, processing aids, production facilities, storage, distribution, and documentation systems. This study aims to systematically identify halal critical control points throughout the leather tanning process based on the SJPH framework. A qualitative approach was employed through field observations at the Leather Processing Technology Department of Politeknik ATK Yogyakarta and an extensive literature review. The results indicate that critical halal risks primarily arise from the origin and death status of animals at the raw material stage, the use of chemical auxiliaries during beamhouse to finishing processes, and the potential for cross-contamination within production facilities and waste management systems. High-risk inputs include enzymes, surfactants, retanning agents, fatliquors, and finishing materials potentially derived from non-halal sources. These findings underscore the necessity of an integrated, documented, and consistently implemented SJPH to ensure halal integrity across the leather production chain.
Co-Authors Dian Nur Amalia Fadzkurisma Robbika Renita Wahyu Meydasari Sofwan Siddiq Abdullah Sri Suryanti Titik Anggraini Tutik Maryati