• 한국의류산업학회지
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• 제5권3호
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• pp.283-288
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• 2003

Large quantity of metal mordant in natural dyeing has been used. For environmental reason, there is a need to reduce the amount of metal mordant and suggest the optimum amount of metal mordant in dyeing process. In this study, the relationship between mordant concentration and dyeing property was investigated. Various metal mordant concentrations of AI, Cu, Fe, Sn, were studied (from 1 to 5%). After treatment of mordant on cotton fabric, the concentration of metal ion in used mordant solution was quantified. There was no significant difference of the tone of color in mordant concentration from 1% to 5%, Therefore, there is no need to increase mordant concentration over 1%. chitosan treated cotton fabric showed a significant increase in dyeing affinity compared to untreated cotton fabric (the value of ${\Delta}E$ was 20). chitosan increased dye affinity significantly in the presence of mordant. It can be suggested that chitosan itself can replace metal mordants in the future.

• 한국의류학회지
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• 제26권8호
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• pp.1248-1253
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• 2002

Coocus laccae(Laccifer lacca Kerr), usually known as Lac, is a kind of cocoon which is parasitic on the tree around India and China. It contains the laconic acid of red colored dyes and has been used for cosmetic or natural dyeing prior to the introduction of New World cochineal. Nevertheless, the characterization of lac has not been studied, very little informed. The purpose of this study is to examine the effects of dyeing conditions fur Lac extract, such as pH of dye bath, concentration of Lac exact dyeing temperature and time, to find out the optimum conditions. The results were as follow. 1. The highest K/S values of the silk and wool was shown at PH 3 and PH 4. 2. K/S values of the silk came to nearly the adsorption equilibrium state at 40$^{\circ}C$ and the curve of wool showed a dramatic increase with the increase of temperature. 3. Dyed silk and wool fabrics showed good light fastness without using mordants.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2010년도 제3회 국제학회
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• pp.29-30
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• 2010

Cotton fabric is usually dyed with anionic dyes such as direct and reactive dyes. Naturally, there is no affinity for basic dyes to cotton fiber. In this study, to improve the dyeability of cotton fiber with cationic dyes, the fabric was pretreated with air plasma and grafted with acrylic acid to create acidic groups on the surface of cotton fibers. The grafted samples were dyed with natural cationic dye extracted from roots of berberis vulgaris. The effect of plasma treatment and grafting of acrylic acid on the color strength of cotton fabric was studied.

• 한국염색가공학회지
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• 제22권1호
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• pp.71-76
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• 2010

In this study the optimum dyeing conditions and blocking effect of UV deodorization efficiency of Ligustrum japonicum Thunb were investigated. Colorants were water-extracted from Ligustrum japonicum Thunb fruit and freeze-drided to obtain colorants powder. The effects of dye concentration, dyeing temperature, dyeing time, and the number of dipping count were studied. Fastness to dry cleaning, rubbing, perspiration, and light were measured according to KS K 0644, KS K 0650, KS K 0715 and KS K 0700, respectively. In order to examine the dyeability according to dyeing conditions, reflectance of fabrics were measured by using UV/VIS spectrophotometer. The bath ratio was 1:20. Dyeing concentration was 100, 200, 300, 400 and 500% on the weight of fiber. Dyeing time was 20, 40, 60, and 80 minutes. Dyeing temperature was 20, 40, 60, 80, and $100^{\circ}C$. The infrared high pressure dying machine was used. As dyeing concentration increased, dye adsorption increased up to 400% and it slowed down. Dye uptake was increased with raising themperature up to $80^{\circ}C$ and it slowed down. Dye adsorption occurred rapidly at first 20 minutes and then it slowed down and reached almost maximum dye uptake at 60 min. Dye uptake increased by repeated dyeing. Therefore, it is considered that optimum dyeing condition is 400%(o.w.f.), $80^{\circ}C$, 60 min. And repeated dyeing improves dye uptake. Color fastness to dry cleaning and rubbing was good, but light fastness and perspiration fastness was not good. Blocking effect of ultraviolet radiation and deodorization efficiency was good.

• Natural Product Sciences
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• 제5권2호
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• pp.88-92
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• 1999

Inhibition of gap junction-mediated intercellular communication (GJIC) has been considered as an important factor in the tumor promotion phase of carcinogenesis. Recovery effects of natural products on gap junctional intercellular communication are measured by scrape-loading and dye transfer method using Lucifer yellow after administration of phorbol-12-myristate-13-acetate (PMA) on WBF344 cells. Among tested natural products, the hexane fraction and subfractions (F-01 and F-04) of Setaria italica were relatively effective for recovery of GJIC. The hexane fraction of Setaria italica $(EC_{25},\;12.14\;{\mu}g/ml)$ and subfractions $(F-01:EC_{50},\;10.74\;{\mu}g/ml;EC_{25},\;1.58\;{\mu}g/ml,\;F-04:EC_{50},\;11.03\;{\mu}g/ml;\;EC_{25},\;3.12\;{\mu}g/ml)$ revealed dose-dependent recovery effects on GJIC. Our data show GJIC activity measurement by Lucifer yellow spread on cells can be an effective tool for the screening of natural products with possible cancer chemopreventive effects.

• Bulletin of the Korean Chemical Society
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• 제15권6호
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• pp.413-416
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• 1994

• 한국의류학회지
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• 제31권9_10
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• pp.1408-1417
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• 2007

In Korea, to deal with the housing needs of the elderly, the government operates free nursing homes and residential homes. And to deal with the needs for daily necessities, imported products or products for the disabled have been supplied for the elderly. The government has recognized the importance of silver industry in this rapidly aging society and has established strategies to vitalize industries related to seniors to deal with the seniors' need for food, clothing, and shelter. This study examined the necessity of nursing home gowns, and the development of nursing home gowns that are environmentally friendly, beautiful and functional for the new silver generation. For this study, literature review and Internet search were conducted regarding the status of silver fashion, necessity of nursing home gowns, emergence of new silver generation and change in lifestyle, and value and utilization of natural dye and traditional patterns. To produce nursing home gowns, fabric was dyed using fermented indigo dying, and 3 styles of nursing home gowns for each gender were designed in consideration of seasons. Lastly, these gowns were evaluated by fashion experts, medical personnel, hospital gown and silver wear experts, and natural dye experts. The results showed that the traditional Korean designs developed in this study were excellent and the fermented indigo dye was appropriate for the nursing home gowns. The development of nursing home gowns in this study will be utilized as basic material for the development of silver wear and nursing home gowns to improve the quality of life for the seniors.

• Advances in environmental research
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• 제8권1호
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• pp.23-38
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• 2019

In this study, Malachite Green (MG) dye removal from synthetic wastewaters by adsorption process using raw boron enrichment waste (BEW) and it's modifications (with acid and ultrasound) were aimed. 81% MG removal was obtained by BEW at optimum equilibrium conditions (time: 40 min., dosage: 500 mg/dm³, pH: 5-6, speed: 200 rpm, 298 K). MG removal from wastewaters using acid modified boron enrichment waste (HBEW) was determined as 82% at optimum conditions (time: 20 min., dosage: 200 mg/dm³, pH: 10, speed: 200 rpm, 298 K). For ultrasound modified BEW (UBEW), the highest MG removal percent was achieved as 84% at optimum conditions (time: 30 min, dosage: 375 mg/ dm³, pH: 8, speed: 200 rpm, 298 K). The equilibrium data of Malachite Green was evaluated for BEW, HBEW and UBEW adsorbents by using sorption isotherms such as Langmuir, Freundlich and Temkin models, out of which Langmuir model (R² = 0.971, 0.987 and 0.984) gave better correlation and maximum adsorption capacity was found to be 147.05, 434.78 and 192.30 mg/g, respectively. The adsorption kinetics followed the pseudo-second-order kinetic equation for sorption of MG onto wastes. A look at thermodynamic data reveals that natural sorption is spontaneous and endothermic because of free negative energy exchange and positive change in enthalpy, respectively. The results indicated that boron enrichment waste, and HCl and ultrasound-modified boron enrichment waste served as good alternative adsorbents in dye removal from wastewater.

• 복식문화연구
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• 제25권5호
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• pp.648-655
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• 2017

This study measured dyeing properties under different dyeing conditions and levels of antimicrobial activity when man-made fibers are dyed with gallnut, including rayon, tencel, tencel blended fabric, soybean fiber, and nylon non-mordanted. The dye up-take (K/S), color ($L^*a^*b^*$), and color differences (${\Delta}E$) were measured with a colorimeter, and the number of bacteria present in the dyed fabrics were determined using Staphylococcus aureus and Klebsiella pneumonia as strains. The results are as follows: First, the optimal dyeing conditions for man-made fibers dyed with gallnut are 60 minutes of dyeing time and a $80^{\circ}C$ dyeing temperature. Second, gallnut dye is most effective on soybean fiber and then, in descending order of effectiveness, on nylon, rayon, tencel, and tencel blended fabric. This means that dyeing properties of nitrogen containing fibers are excellent when using gallnut. Third, all man-made fibers are dyed brown with gallnut. This implies dyeing possibility of man-made fibers about gallnut dye, so development and supply of natural dyed goods of man-made fibers can be increased. Fourth, in all man-made fibers dyed with gallnut extract, both Staphylococcus aureus and Klebsiella pneumonia show 99.9% reduction ratios of fungistasis, which indicate antimicrobial activity. Therefore, safe, functional, man-made materials can be developed to relieve symptoms from and treat patients with skin ailments.

• 자연과학논문집
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• 제11권1호
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• pp.151-157
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• 1999

승화성이 우수한 분산염료를 사용하여 면포에 대한 열 전사 염색성의 최적조건을 알아보기 위하여 온도, 시간, 농도에 따른 전사 염색에 대하여 연구하였다. 이 최적조건에 따라 팽윤제를 첨가한 후의 열 전사 염색성과 전 처리된 면포의 열 전사 염색성 및 분자량에 따른 열 전사 염색성을 검토하였으며, 세탁견뢰도와 일광견뢰도를 측정하여 열 전사날염에 대한 염색견뢰도를 측정하였다. 분산염료를 사용하여 면포에 대한 열 전사날염의 최적조건은 염료용액의 농도는 5%로, 처리온도가 $200^{\circ}C$, 처리시간은 3분에서 열 전사 염색성이 우수하였다. 면포에 대한 전처리의 시간이 길어질수록 열 전사 염색성이 향상되었으며, 팽윤제로는 Glycerin이 우수하였고, 혼합처리보다는 전처리가 열 전사 염색성이 우수하였다. 분자량에 따른 열 전사 염색성은 혼합처리의 경우 분자량이 작을수록 열 전사 염색성이 향상되었으며, 분자량이 커짐에 따라 열 전사 염색성이 나빠짐을 나타내었다. 그러나 전처리의 경우는 분자량에 큰 영향을 받지 않음을 나타내었다. 열 전사 날염된 면포의 세탁견뢰도는 염료의 분자량이 작은 것이 우수하였고, 일광견뢰도는 염료의 분자량이 큰 것이 보다 우수한 견뢰성을 나타내었다.