• 패션비즈니스
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• 제16권4호
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• pp.100-106
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• 2012

This research was carried out to find the mordant effect of Chestnut's inner skin on the cow leather dyed by Turmeric powder. The best proper mordanting conditions were examined by changing mordant method, concentration, temperature, bath ratio, time, and repetition. Also dyeability and surface color changes were evaluated by various mordanting methods. The optimum mordanting conditions of chestnut's inner skin extract on the cow leather were pre mordant, 80%, $50^{\circ}C$, 50:1, 40minutes, 4 repetition. The K/S values as a mordant were higher in pre mordant than post mordanting condition. Although the ${\Delta}E$ was slightly higher in post mordant than pre mordant, it was too small to find any means. The surface colors of all dyed cow leathers were yellow. Among light, dry cleaning, and abrasion fastnesses, only light fastness was increased one degree, others were same degrees.

• 패션비즈니스
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• 제15권4호
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• pp.182-189
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• 2011

Dyeing properties of cow leather was investigated with Tumeric powder. The effects of dyeing conditions, mordanting conditions, color change, and color fastnesses were studied. The results were as follows. The dye uptake increased as dye concentration, dyeing temperature, and bath ratio increased. In the effect of dyeing time, the highest dye uptakes showed at 20 minutes and decreased after that point. Pre mordanting was more effective than the post mordanting, and the dye uptakes improved all mordanted fabrics. The highest K/S values showed in pre-Al sample, and the lowest K/S values showed in post-Cu one. The values of Hunter on the samples were more changeable $L^*$ and $b^*$ than $a^*$, and all samples showed Yellow color in Munsell value. But the mordanting methods and mordanting agents were not significant in the color changes. The light fastness of dyed samples showed 1 grade, the dry cleaning and abrasion fastnesses did not improved except post-Fe wet sample.

• 패션비즈니스
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• 제17권4호
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• pp.140-148
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• 2013

This research was carried out to find the dyeabilities and mordants effects of cow leather dyed with Lac powder. They were examined by changing dye concentration, dyeing temperature, bath ratio, dyeing time, and dyeing repetition. And K/S values and surface color changes were evaluated by various mordanting conditions. The optimum dyeing conditions of the cow leather dyed with Lac powder were 30%, $40^{\circ}C$, 30:1, 30minutes, and 4 repetitions. The K/S values were higher in post mordant than pre mordanting condition. The surface colors of dyed cow leathers were R and RP. The dye fastnesses increased in post Cu and Fe mordanting, as decreased in gallnut and chestnut's skin conditions.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 1996년도 수산관련공동학술대회발표요지집
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• pp.271-273
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• 1996

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 1997년도 수산관련공동학술대회발표요지집
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• pp.205.1-206
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• 1997

• 복식문화연구
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• 제24권6호
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• pp.817-824
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• 2016

The introduction of natural dyes into modern dye houses is very promising green chemistry concept that should be popularized more to reduce the dependency of leather dyeing on some toxic and non-biodegradable synthetic dyes. In this study, the properties of dyeing of cochineal on cow leather were evaluated. The proper dyeing conditions were identified with dye uptake (K/S values) depending on the colorant concentration, dyeing duration, dyeing temperature, and dye bath pH. For the proper mordanting conditions, color changes for different mordants were observed as $La^{*}b^{*}$ and H V/C values. Color fastness (light, rubbing, and dry cleaning) was also examined. Additionally, antibacterial properties and UV protection were examined. The results were as follows: The optimized dyeing conditions were 300% o.w.f., $40^{\circ}C$, 40 min., and pH 5. The cow leather color was red in the absence of mordanting, while it was red purple after being mordanted with Al and Cu, and purple mordanted with Fe. The K/S value of cow leathers increased in the order of the dyeing using $AlK(SO_4)_2$ > $CuSO_4$ > $FeSO_4$. The colorfastness to light and rubbing were reduced compared to original (untreated) cow leather. However dry cleaning fastness was very satisfactory, with a 4~5 rating. The dyed and pre-mordanting dyed cow leather showed excellent antibacterial properties.

• 대한가정학회지
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• 제50권2호
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• pp.85-92
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• 2012

This was a study examining the fatliquoring of natural dyed cow skin with Coptis chinensis Franch. The K/S according to optimal dyeing condition, mordants and mordanting method was measured. And the surface, sections, tensile strength, elongation, stiffness and colorfastness according to post-dyeing fatliquoring were observed. The optimal conditions include 300%(o.w.f.), $50^{\circ}C$, 30 minites. Fe-simmordanting showed the highest dyeability. Coptis chinensis Franch showed a yellow color regardless of mordants and mordanting methods. Tensile strength and elongation increased in the case of simmordanting compared with untreated and the process of fatliquoring further increased. The softness significantly increased when fatliquored. Shrinkage was slightly reduced when dyed, but showed almost no change with fatliquoring. Lastly, color fastness increased overall with mordanting and partly increased with fatliquoring. The rubbing and light fastness were excellent Cu- mordanting, and drycleaning fastness also improved with Cr-mordanting.

• 한국가금학회지
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• 제11권1호
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• pp.13-17
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• 1984

동물성 단백질사료인 가수분해 우피분을 16시간 pepsin-HC$\ell$용액 농도별 (0.2%, 0.1%, 0.05%) 0.025%, 0.0125%과 0.2% pepsin-HC$\ell$ 소화시간별 (4, 8, 12, 16, 20시간)로 45$^{\circ}C$ incubator에서 소화시키고 0.75 N HC$\ell$로 acid blank value를 보정하여 in vitro pepsin-HC$\ell$ 단백질 소화율을 측정하였는데 그 결과는 다음과 같다. 1. 0.2% pepsin-HC$\ell$에서 4, 8, 12, 16, 20시간 소화시 단백질 소화율은 각각 66.31 %, 80.69%, 83.27%, 84.65%, 87.45%로서 80% 이상의 소화시간은 8시간이었고 시간이 증가하면 소화율도 향상되었다. 2. Pepsin-HC$\ell$농도 0.2%, 0.1%, 0.05%, 0.025%, 0.0125% 수준에서 16시간 소화시 단백질 소화율은 각각 85.10%, 82.08%, 76.18%, 74.67%, 64.82%로 pepsin-HC$\ell$농도가 낮아질수록 단백질 소화율도 낮아졌다.

• 보존과학회지
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• 제27권2호
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• pp.155-162
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• 2011

피혁유물은 온·습도, 빛, 충 균 등 다양한 환경요인에 의해 복합적으로 손상된다. 본 연구 결과, 피혁은 원피의 종류에 따라 화학적 조성에 차이가 있어 같은 환경에서도 손상정도가 다르다는 것이 확인되었다. 자외선 열화에 따른 전체적인 색차 및 광택도 변화 및 변색은 우피, 양피, 돈피의 순으로 심하게 관찰되었다. 또한, 피혁은 단기간에는 습도에 관하여 안정적인 결과를 나타났으나 고습의 환경이 지속된다면 곰팡이나 미생물이 발생되기 쉬우므로 주의해야 한다. 본 연구는 피혁유물을 이해하고, 보존환경기준을 제시하여 향후 피혁유물의 보존관리 방안을 수립하는 데에 있다.

• KSBB Journal
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• 제15권6호
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• pp.635-643
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• 2000

To compare the antioxidative activities of fish skin and bovine skin gelatin hydrolysate, gelatin hydrolysates from Alaska pollack and bovine skin were prepared by various enzymatic hydrolysis methods (1st step, Alcalase; 2nd step, pronase E; 3rd step, collagenase) using a continuous three-step membrane reactor. The molecular weight distributions of the 1st, 2nd and 3rd step hydrolysates were 7∼10 kDa, 2∼5 kDa and 0.7∼0.9 kDa, respectively. The antioxidative activity of fish skin gelatin hydrolysate was stronger than that of bovine skin gelatin hydrolysate, and in particular, both of 2nd step hydrolysates showed more antioxidative activity than hydrolysates of any other step. The optimum antioxidative activity concentration of the 2nd step hydeolysates of fish and boving skin were 1% (w/w) in a linoleic acid water-alcohol emulsion. In cultured cells exposed to t-butyl hydroperoxide (t-BHP), the 2nd step hydrolysate of fish skin gelatin delayed cell death most. These results suggest that the antioxidative activity of fish skin gelatin hydrolysate is higher than that of bovine skin gelatin hydrolysate because of their different amino acid contents.