• 한국의류학회지
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• 제22권4호
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• pp.469-476
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• 1998

The natural dyestuff(chestnut dye) was manufactured from chestnut hulls by boiling in 0.5 NaOH solution and powdering in freeze dryer. To investigate the dyeability and color fastness, cotton, wool, silk and nylon fabrics were dyed under several conditions using the manufactured chestnut dye. Dyeing operation was carried in acidic dyebath of pH 4-5 because the chestnut dye is anionic. Dyeabilities on wool, silk and nylon fabrics were good, especially nylon fabrics were dyed deeper than others. But dyeability on cotton fabrics was not good. All the dyed fabrics showed excellent color fastness to crocking. Color fastness to laupdering of them were moderate to good. Also light fastness of them were moderate to good except nylon. The light fastness of dyed nylon fabrics was as poor as grade 1. But they could be improved to grade 4 by aftertreatment with gallic acid.

• 한국염색가공학회지
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• 제12권4호
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• pp.248-255
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• 2000

Polyester fibers and fabrics have been dyed with disperse dyes in alkaline dyebath such as alkaline buffer and alkaline auxiliary(JPH-95) comparing a traditional acidic dyeing. After dyeing the samples were extracted with 100% DMF, and washing and rubbing fastnesses were measured. In dyeing at $100^\circ{C}$ the dyeing rate increased with decreasing fiber denier, regardless of dye baths, whereas the dyeing rates of the same denier fiber increased in the order of alkaline dyeing>acidic dyeing>JPH-95 dyeing. In dyeing at $130^\circ{C}$ the dyeing rate of PET fiber in JPH-95 dye bath decreased compared with the other two types of dye baths. In the time and temperature curve the dye uptake of JPH-95 dyeing was higher than the other two types of dye baths in the range of low temperature$(95~115^\circ{C})$. The equilibrium dye uptake increased in the order of 0.52d>2.04d>0.05d fiber. Washing fastness had no change in all three types of dye baths. But rubbing fastness was not good for alkaline dyeing except black dyes.

• 한국염색가공학회지
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• 제8권3호
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• pp.24-30
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• 1996

In order to investigate the light fastness of amino azo disperse dyes, some kinds of disperse dyes were prepared and dyed to polyester fabric under the different conditions, such as single or mixture state. After the dyed fabric was irradiated with carbon arc light for several hours, the color differences and K/S values of fabric were measured. The light fastness of amino azo disperse dye was decreased by the introduction of OH group to the dye molecule. But when the amino azo dye was mixed with the anthraquinone disperse dye, the light fastness was increased. It was considered that the dye molecules were aggregated on account of hydrogen bonding via OH groups, resulting the decrease of surface area of dye molecule which might be irradiated by the light.

• 한국의류산업학회지
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• 제17권1호
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• pp.127-136
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• 2015

The purpose of this study was to examine improvements in dye uptake, expression of various colors, and color fastness when washed or exposed to light. We examined these improvements by doing the combination dyeing of Juniperus chinensis heartwood and Alnus japonica heartwood extracts. In this study, two combination dyeing methods were used. One-bath dyeing involves combining Juniperus chinensis heartwood extract and Alnus japonica heartwood extract. Two-bath dyeing involves dyeing by sequence, which means that we dyed the Juniperus chinensis heartwood extract first and then dyed Alnus japonica heartwood extract sequentially (or in the opposite order). In terms of improving dye uptake, two-bath dyeing was more effective than one-bath dyeing. For cotton, dyeing Juniperus chinensis heartwood extract first and then dyeing Alnus japonica heartwood extract sequentially showed higher dye uptake in the two-bath method, while for silk, there wasn't much difference in the dyeing order. Through combination dyeing, red-violet color from Juniperus chinensis heartwood and brown color from Alnus japonica heartwood made various Y, YR, R series of color as a result. Moreover, combination dyeing improved fabric's fastness when washed or exposed to light. In the case of cotton, fabric dyed using two-bath dyeing, with Juniperus chinensis heartwood extract being the first dye, showed improvement in fastness to washing and light. And in the case of silk, fastness to washing and light improved regardless of dyeing order in two-bath dyeing.

• 한국염색가공학회지
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• 제20권5호
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• pp.35-40
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• 2008

Dyeing and washing fastness properties of polyurethane-impregnated polyester (PU-impregnated PET), and the distribution of two disperse dyes between PET and PU film were studied to investigate the effect of PU portion to exhaustion and washing fastness. Dyeing properties of PU-impregnated PET were quite different with those of PET: PU-impregnated PET absorbed disperse dye linearly from the early stage of dyeing to equilibrium, and it exhibited excellent build-up property up to 4 %owf dyeing. The absorbed dye on PU film at early dyeing stage migrated to more substantive PET at the temperature higher than $115^{\circ}C$. The amount of exhausted dye on PET portion was larger than on PU film and the distribution ratio was $2.08{\sim}2.34$. The grade of washing fastness of PU-impregnated PET was the same as or lower by $0.5{\sim}1$ grade than PU film whose washing fastness was lower by $0.5{\sim}1$ than PET.

• 한국염색가공학회지
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• 제17권5호
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• pp.13-19
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• 2005

Dyeing and fastness properties of direct spun type PET microfiber fabrics have been investigated. The dye uptake of finer microfibers commenced at lower temperatures and showed faster rate of dye uptake. The build-up and wet fastness properties of disperse dyes on finer microfbers were relatively poor since the more dye was needed to achieve a given depth of shade due to the large surface area.

• 한국염색가공학회지
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• 제21권6호
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• pp.12-21
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• 2009

The dyeing property of direct-spinning type and seaisland type 0.2D micro polyester nonwoven fabrics was characterized by three disperse dyes (Dorosperse Red KFFB, Blue KGBR, Yellow KRL) at $120^{\circ}C$ and $130^{\circ}C$. Before and after reduction cleaning, dyeing fastness was evaluated and the thermomigaration after heat setting at $180^{\circ}C$ for 60 min were also evaluated. Direct-spinning type fabric showed better dyeing property, wash fastness, and light fastness, but worse rub fastness than seaisland type fabric. The dyeing property and fastness of direct-spinning type fabric increased at higher dyeing temperature, whereas seaisland type fabric exhibited lower dyeing fastness and the increase of thermomigration at higher dyeing temperature. Non-fixed dye in fiber surface was removed by reduction cleaning process, then dyeing fastness was improved and thermomigration decreased. The higher dye uptake of direct-spinning type non-woven fabric caused the increase of dye molecule migration from fiber internal to fiber surface, so this fabric showed larger thermomigration than seaisland type non-woven fabric.

• 한국염색가공학회지
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• 제13권3호
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• pp.180-187
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• 2001

Generally, polyester microfiber has much greater dye uptake than that of regular ones. In spite of high dye up-take visual shade depth of dyed fabric decreases with smaller denier, which results in poor washing fastness of dyed fabric. In this study, in order to investigate the washing fastness, polyester microfiber fabric was dyed by using two type of disperse dyes and treated with 3 different reduction clearing methods. The reduction clearing methods in this study are normal alkaline reduction clearing, $N_2$ gas replacement method, and ultrasonic treatment during reduction clearing. The results were as followings ; The most important factors affecting the washing fastness of polyester artificial suede fabric were found to be the reduction clearing method, the chemical structure of used disperse dyes and the structure and denier of fibers. It was also obtained that the heat treatment of dyed fabric decreased the washing fastness due to the dye migration from inner phase to surface.

• 패션비즈니스
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• 제22권4호
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• pp.106-117
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• 2018

The present study was conducted to investigate dyeing properties and functionality of silk fabrics dyed with extracts from buckwheat skin. Comparative results of color strength(K/S) values of dyed silk fabrics were studied to quantify the effects of dye concentrations, dyeing temperatures, dyeing time and the pH; the effect of mordants; and color changes. And also evaluated the fastness, antimicrobial property, ultraviolet protection properties of the dyed and mordanted silk fabrics. The color strength(K/S) values of silk generally increased depending on the increasing dye concentration, dyeing temperature, and dyeing time. And the highest color strength values were obtained at a dye concentration of 100%(v/v), a dyeing temperature of $90^{\circ}C$, a dyeing of time 80 minutes, and a dyebath of pH 2. The color fastness to light of dyed and mordanted silk fabrics were found to be good, and the drycleaning and rubbing fastness were excellent. The fade of washing fastness was not good, however, the stain of washing fastness and perspiration fastness showed relatively good grade. The Al, Cu, Fe mordanted silk fabrics(except Fe for Klebsiella pneumoniae) showed 99.9% reduction rate. The ultraviolet protection properties of the mordanted fabrics were generally improved. Moreover, the Cu and Fe mordnared fabrics showed very exceptional ultraviolet protection factors.

• 한국염색가공학회지
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• 제25권4호
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• pp.262-270
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• 2013

Temporarily solubilized reactive disperse dyes containing ${\beta}$-sulfatoethylsulfonyl group were applied to 100% meta-aramid knitted fabric and their dyeing properties were investigated. Reactive disperse dyes showed relatively high K/S values on meta-aramid fabric when compared with conventional disperse dye or reactive dye, which showed very low K/S values. Color yields of reactive disperse dyes were highly dependent on dyeing pH and optimum results were obtained at pH 6. Percent exhaustion of reactive disperse dye on meta-aramid fabric was over 80% at 2% o.w.f of dye concentration. Wash fastness of pyridone-based reactive disperse dyes was very good to excellent while that of aminoazobenzene reactive disperse dyes was medium to good. Light fastness of all the reactive disperse dyes was very poor which seems to be due to the low photostability of meta-aramid fiber itself.