• 한국염색가공학회지
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• 제12권3호
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• pp.174-182
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• 2000

We prepared natural indigo/calcium hydroxide complex powder from tinctoria's leaf, according to the demand of developing new dyeing technique of natural fibre with natural indigo. FT- IR and UV/Visible spectra were operated to find the dyeing properties of synthetic indigo and natural indigo powder. Cotton, flax and silk fabrics were dyed with different pH, dye concentration and dyeing time. The colour yield of indigo dye was quite sensitive to dye bath pH and fabric. In synthetic indigo, the highest K/S value of dyed silk fabric was shown at near pH 9.0, and which of flax and cotton fabric were shown at pH 11.0. In other hand, in the case of natural indigo complex powder, the highest K/S value of dyed silk fabric was shown at near pH 8.0, and which of flax and cotton fabric were shown at pH 9.5∼pH 10. Mercerized cotton fabric dyed with natural indigo powder has a little antimicrobial activity.

• 한국염색가공학회지
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• 제26권3호
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• pp.254-262
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• 2014

In this study, the colorants of Wisteria floribunda leaf were extracted with water. Silk and wool fabrics have been dyed with the aqueous extract of Wisteria floribunda leaf and their dyeabilities was studied. Additionally the fastness to washing, drycleaning, light and perspiration were also investigated. Silk and wool fabrics dyed with the extract of Wisteria floribunda leaf were colored in yellowish red tint. The optimum dyeing condition of the colorants extracted from Wisteria floribunda leaf was three repeated dyeing at 70, $95^{\circ}C$ for 1hr using post mordanting. For dyed silk and wool fabrics, the fastness to washing was improved by mordanting, and the fastness to drycleaning was very outstanding.

• 한국염색가공학회지
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• 제6권1호
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• pp.1-7
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• 1994

A low-temperature dyeing system for silk fabrics based on a redox system has been investigated. Some factors affecting dyeing of silk fabrics with levelling acid dyes in the absence and presence of certain redox system were investigated under different conditions. The variables studied were; type and concentration of redox system, dyeing conditions, i. e. temperature and time, dye concentration, material-to-liquor ration(LR) and colour fastness. The colour strength(K/S value) is outstandingly higher in the presence than in the absence of redox system. A comparison between the colour strength values of such dyeings abtained the three redox system would call for the following order ; Glyoxal/hydrogen peroxide>thiourea/hydrogen peroxide>glucose/hydrgen peroxide> nothing. In the presence of redox system, free radicals are supposed to be formed in both the fiber and the dye and the interaction between these free radicals bring about covalent fixation beside the usual electrostatic bonds, hydrogen bonds and Van der Waals forces.

• 한국잠사곤충학회지
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• 제45권1호
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• pp.66-70
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• 2003

천연 염재인 감 및 감나무 잎에서 추출한 염액에 견직물을 염색한 후, 매염제의 종류에 따른 K/S값, 염색성을 측정하였고, 견직물의 천연염색성과 물성을 검토한 결과 다음과 같은 결론을 얻었다. 1. 색상은 각각의 매염제에 따라 다르게 나타났으며, 후매염법이 K/S값이 크게 나타났다. 2. 감 열매가 감잎보다 짙은 남청색을 나타내었다. 3. 추출액의 농도가 높을수록 농색으로 변하였다. 4. 매염제의 종류에 따른 매염량을 측정한 결과, FeSO$_4$ 매염제가 우수한 염착량을 나타내었다. 5. 감에 의한 천연염색에 있어서 강연도와 인장강도의 물성에는 큰 변화가 없었다.

• 한국염색가공학회지
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• 제13권1호
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• pp.45-54
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• 2001

The Purpose of this studs was to investigate dyeing properties of silk and nylon fabrics by Polygonum cuspidatum extract. The properties were evaluated by it's extracting condition, dyeing condition, mordants variables, methods of mordanting and color fastness. Silk fabric showed the highest K/S value at $50-70^\circ{C}$, while Nylon fabric showed at $90^\circ{C}$. Surface color of dyed fabrics were various by the used mordants ; none-, and Al-mordanted fabrics were yellow, Cu-mordanted fabrics were redish yellow, Fe-mordanted fabrics were olive green. Fe-mordanted silk fabrics showed excellent laundering fastness and light fastness. Both silk and nylon fabric showed excellent laundering and dry cleaning fastness.

• Fibers and Polymers
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• 제7권2호
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• pp.180-185
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• 2006

A pineapple protease, bromelain, was used to improve the dyeing properties of protein fibers such as wool and silk. The optimal condition for the activity of the pineapple protease was about $60^{\circ}C$ at pH 7. The wool and silk were treated with the protease extracted from a pineapple and the K/S values of the dyed wool and silk were measured using a spectrophotometer in order to compare the dye uptake. The protease treatment enhanced the dyeing properties of protein fibers without severe changes in mechanical properties. The surface appearances of protease-treated fibers were observed by microscopy.

• 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.

• 패션비즈니스
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• 제13권3호
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• pp.109-117
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• 2009

To set up the outstanding and scientific dyeing method in making the condensed liquid of pigment obtained from onion skins and the improved reliability, the following basic experiments were performed. The pigment was extracted in the distilled water at $70^{\circ}C$ and methanol at room temperature and then it was analyzed with LC/MS/MS system (Liquid Chomatography/Mass Spectroscopy/Mass Spectroscophy, LIQ Advantage Max, Thermo Finnigan, USA) for its pigmental characteristics. The unrefined silk and refined silk were dyed by making use of the derived pigment in such a way. The chromameter (CR-200, Minolta, Japan) was used to measure the change in surface color in textiles to be dyed by the extracting condition and the color difference ${\Delta}E$ was determined according to the color difference formula CIE LAB through measuring the psychometric lightness L* and chromaticity coordinates a* and b*.

• 한국의류학회지
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• 제28권7호
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• pp.882-891
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• 2004

The purpose of this study was to improve dye effect and method in order to facilitate the use of persimmon juice dyeing. Silk fabrics were pad-dyed to 100% pick-up using padding machine after dipping in persimmon juice extracted from unripe persimmons indigenous to Jeju. The color of dyed silk fabrics by padding method was more even and repeatable than that by traditional hand method. Persimmon juice concentrations were 4 types 10, 25, 50 and 100%. The silk fabrics were pad-dyed to 100% pick-up and were repeatedly dyed two times and three times with 100% concentration. The higher the concentration, the more color deepened. UV Irradiation instead of sunlight was applied to color developing. Irradiation times were shortened to 1-8hrs. Color values which reguired 30-50 hrs. in sunlight irradiation. were obtained in 3-5 hrs. with UV irradiation. Tensile strengths of silk fabrics in UV irradiation decreased but not decreased in sunlight irradiation. Elongations of silk fabrics in sunlight irradiation increased but decreased in W irradiation. Drape stiffness increased up to three times.

• 한국염색가공학회지
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• 제4권4호
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• pp.73-80
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• 1992

The influence of four types of reactive dyes that are different in reactive group on silk fabric were investigated at three different temperatures, 5$0^{\circ}C$, 7$0^{\circ}C$, 9$0^{\circ}C$ and the pH range from 7.0 to 11.0. The amount of absorption and fixation showed the optimum condition. The damage of silk during dyeing was determined by the change of physical properties. The results are given as follows: 1. The amount of dye fixed on fabrics at constant pH varied upon the reactivity of dyes. The affinity of dyes for silk fabrics were in order of Lanasol>Procion>Remazol>Cibacron. 2. The percentage of dye fixation on fabrics showed different tendency with temperature. The dye fixation of Cibacron and Procion was decreased above 7$0^{\circ}C$ because of the influence of hydrolysis. The dye fixation of Lanasol and Remazol was increased with the increase of temperature. This showed that temperature did not affect on hydrolysis. 3. The tensile strength of dyed fabric decreased with increasing pH and temperature owing to high temperature and alkaline damage on silk fabric. 4. The optimum conditions of dyeing silk with reactive dyes were as follows: Cibacron -7$0^{\circ}C$, pH 9.0, Procion-5$0^{\circ}C$, pH 7.0, Remazol-5$0^{\circ}C$, pH 8.0, and Lanasol-9$0^{\circ}C$, pH 9.0.