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Entin Darmawati
Politeknik ATK Yogyakarta
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PENGARUH BAHAN FIKSASI TERHADAP INTENSITAS WARNA DAN KETAHANAN LUNTUR PEWARNAAN KULIT CRUST IKAN PARI DENGAN PEWARNA SECANG (Caesalpinia sappan L) Entin Darmawati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 15 No 1 (2016): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

Research objective is to now determine the effect of different fixation materials and dye concentration secang ( Caesalpinia sappan L ) Pari crust on the skin of the fish ( Dasyatis Khulii ) dye method to color intensity and fastness . Research coloring process secang on crust leather stingray with the Immersion Method Material Variation fixation (tawas, tunjung ) concentration (3%,6%,9%) b/v, the concentration of dyes cup (5 % , 10 % , 15 % w / v ), immersion time ( 60 minutes , 90 minutes , 120 minutes ) , the intensity of the color and fastness. Analysis of the data using the program Variant Analysis ( Anova ) classification 3 lanes. Results The color intensity and fastness test on crust leather stingray no difference to a dry rub to demonstrate the value of SS ( Stainning Scale ) of 4.0 ( good ) on secang concentration of 5 % w / v , staining time of 120 minutes and fixation Tunjung ( 6 % ) , the intensity of the color is darker ., A value of 4.5 ( good ) on the fixation of lotus 6 % % w / v , concentration secang 10 % w / v , staining time of 120 minutes . Fixation alum 6 % . SS value = 4.5 ( good ) , secang concentration of 10% , the intensity of a lighter color . It can be concluded that the intensity of the color indicates that the fixation material is able to bind more strongly lotus leave a blue-red color of the material fixation alum gives pink and test results of color fastness to rubbing lotus stronger than alum the higher the concentration of fixation , then the better the erosion resistance.
KAJIAN PEWARNA SECANG LIMBAH CAIR PEWARNAAN KULIT TERSAMAK TERHADAP UJI TOKSISITAS AKUT BENIH IKAN MAS (Cyprinus carpio L) Entin Darmawati; Sudarmadji Sudarmadji; Umar Santoso
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 1 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The Research aims to know the exposure and acute 96-hour toxicity test of dye liquid waste (natural and synthetic) on chrom leather from sheep and cow crust towards goldfish seed. The materials used are dye liquid waste of secang (fermented and dried treatment) and synthetic (Acid Dyestuff); and goldfish seed (Cyprinus carpio L). The research has been done in 3 (three) phases: (1) Acclimatization, (2) Acute Toxicity Test LC50-96h, and (3) Probit Analysis Calculation. The data collected were the number of death of tested fish within 96 hours and then analyzed by using probit method (Probit Analysis). The result of the research shows that there are differences of toxic effects of liquid waste from secang and synthetic dyes. Secang dye has lower toxic effect category (slope value = 4.0, LC50-96hour=29.51%), with upper threshold value (N) of 32.0%. In lower threshold value (n) of 28.0% of this concentration, 50% animals tested died. Synthetic dyes had high toxic effect categories (slope value = 11,36, LC50-96hour =1.44%), with upper threshold value (N) of 4.0%. In lower threshold value (n) of 1.5.0% at this concentration tested animals, i.e. goldfish seed (Cyprinus carpio L), experienced 50% mortality on acute toxicity test (LC50 -96 hours). It can be concluded that secang dye is more environmentally friendly than synthetic ones, so it can be used as an alternative in the process of dyeing in the leather industry.
PENERAPAN PEWARNA INDIGO DARI DAUN INDIGOFERA L PADA KULIT CRUST SUEDE DOMBA DENGAN TEKNIK IKAT MOTIF JUMPUTAN Entin Darmawati; Sudarmadji Sudarmadji; Umar Santoso
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 16 No 2 (2017): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

This study aims to absorb the blue Indigo dye on the skin of sheep crust suede with the technique of binding in order to produce a jumputan motif on tanned skin. Materials used were Indigo leaves (Indigofera L) and tanned leather from sheep crust suede. This research used experimental method with 3 (three) stages: (1) Making blue Indigo dye by enzyme hydrolysis process, (2) Creation of tanned leather motif with binding technique and (3) Application of blue Indigo dye on sheep crust suede using dyeing method with variations: (a) concentrations (6%; 12% and 18%); (b) dyeing time (1.5 hours, 2 hours); (c) bonding techniques (single, double and cross towards color fastness on jumputan motif pattern). The results of the color fastness were the value of 5/4, meaning good, no color changes to the original one at concentrations of 12% and 18%, time 2 hours, double bond motifs, and the value of 4/3, meaning good enough with a little faded at concentration of 6%, 2 hour time, double bond motif, and the most optimum absorption (82%) on the sheepskin's croupon. It can be concluded that the indigo dye gives blue color which can be applied to sheep crust suede with binding technique of jumputan method to produce unique and exclusive motif as raw material of leather product or craft.
Co-Authors Sudarmadji Sudarmadji Umar Santoso