• Textile Coloration and Finishing
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• v.32 no.4
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• pp.199-207
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• 2020

Recently, as the demand for masks increases, the use of filter-replaceable cotton masks is increasing. A filter-replaceable cotton mask is one of the ways to solve the environmental problems of a disposable nonwoven mask because only the filter can be replaced after washing. Cotton fiber products are known to be environmentally friendly, but cotton products dyed with general synthetic dyes are not safe for humans. In this study, to prepare of cotton mask applied with natural dyeing, the optimal dyeing conditions are set when dyeing with gallnut extract. A polychromatic natural dye that changes color by mordant, and the functionalities of gallnut dyeing fabrics are evaluated. The experimental method is dyed the gallnut by temperature and time by concentration to set the optimal conditions. The color fastness rating grade of aluminium potassium sulfate dodecahydrate, copper(ll) sulfate pentahydrate, and iron(ll) chloride tetrahydrate were evaluated after the pre/post mordanting.

• Textile Coloration and Finishing
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• v.7 no.4
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• pp.87-96
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• 1995

Colorant concentrates are prepared by use of concentration method of colorants extracted from Sappan wood using met hanol. Dyeabilities and fastness properties of silk fabrics dyed with concentrate of Sappan wood are investigated.The results obtained are as follows; 1. The storage stability of colorant concentrate is poor as concentration is excess. 2. Because the colors of dyeings are different with mordants, aluminium acetate, copper acetate, chromium alum and tin chloride are used in order to obtain reddish color. 3. The optimum dyeing temperature and dyeing time are 6$0^{\circ}C$ and 60 min, respectively. 4. Dry cleaning fastness is very good, and light fastness and washing fastness are low. 5. The dyeing method is simple owing to usehess of colorant concentrate prepared without extraction of colorant every time.

• Journal of Sericultural and Entomological Science
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• v.44 no.2
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• pp.93-98
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• 2002

Effect of reducing agent sodium hydrosulfite on the natural indigo on the silk fabrics were examined to improve traditional dyeing method. K/S values of dyed fabrics was monitored with various dyeing temperature time, amount of dye and reducing agent. The dyeability of silk fabrics was improved by using reducing agent, sodium hydrosulfite; K/S value (7.20) was higher then that (1.09) of traditional method at the frist dyeing. Natural indigo dye extracted from dyed silk fabrics are composed of isomer, indigo (67.3%) and indirubin (32.5%). However, silk fabrics showed excellent anti-microbial activity regardless of the dyeing methods.

• Fashion & Textile Research Journal
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• v.2 no.2
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• pp.118-122
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• 2000

Dyeing properties of silk fabric with loess were studied by investigating the effect of dyeing conditions, such as concentration of loess, dyeing temperature and time, on dye uptakes. And also the effects of mordant and mordanting methods on color change and dye uptakes were inverstigated. For the practical use, the various color fastness of dyed fabric were evaluated. The dye uptakes of dyed fabric were increased gradually with increasing concentration of loess, dyeing time and temperature. The K/S value of dyed fabric most efficient for the premordanting method. The color fastness was improved when mordants were added.

• Fashion & Textile Research Journal
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• v.11 no.4
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• pp.667-671
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• 2009

The use possibility as a dyestuff of Scutellaria baicalensis was investigated. The optimum conditions were evaluated when silk fabrics were dyed by Scutellaria baicalensis extract. The colorants of Scutellaria baicalensis were extracted better in water than methanol. The optical dyeing concentration was 80%(v/v), dyeing temperature was $80^{\circ}C$, dyeing time was 60minites, dyeing repetition was 2 turns. A Post-mordant method showed higher K/S value than premordant one, especially post-Fe appeared the highest value and post-Cr was second. Surface color was all Y. The color fastness was very good at the second repetition of no mordanted silk fabrics, all mordant fabrics were not improved the colorfastness. The antibacterial activity showed at Staphylococcus aureus tested specimen that bacterial reduction rate was 99.7%.

• Textile Coloration and Finishing
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• v.7 no.2
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• pp.47-54
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• 1995

Safflower is natural red dye largely used for dyeing on cotton. It contains yellowish safflower yellow and reddish carthamin, whose constitution is known. Safflower yellow is water-soluble dye and carthamin is solved in alkaline condition. Carthamon obtained by adding acidic solution to a carthamin shows the original hue of safflower. In present study, the dyeing behavior of natural dye known as safflower are examined in an aqueous acidic medium by use of the different dyeing methods such as traditional, modern and purifide-powder method. The relationship between the dye-uptake of cotton fabric investigated by the three methods and the various dyeing conditions is discussed.

• Textile Coloration and Finishing
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• v.6 no.3
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• pp.67-73
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• 1994

The adsorption behaviors of acid dye and disperse dye on silk and nylon fabrics were examined, in one bath dyeing system on silk/nylon blend fabric with disperse dyes and acid dyes. In the dyeing of nylon fabric with C. I. Disperse Red 19 (Red 19) and C. I. Disperse Red 60 (Red 60), dye uptake of Red 19 was higher than that of Red 60. When silk/nylon blend fabric was dyed with Red 19 and Red 0, the dye uptake on nylon was influenced by the ffinity of the dye to the silk fabric. In the dyeing of silk/nylon with C. I. Acid Blue 80 and C. I. Acid Yellow 121, solid shade could not be obtained with the conventional method but could be obtained with the dyeing resist agent for nylon. There was not any relationship between K/S value and Munsell value, but Munsell value tended to change with the K/S value.

• Textile Coloration and Finishing
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• v.13 no.4
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• pp.241-248
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• 2001

Natural indigo dyeing has been used mainly on cellulosic fibers and silk during the course of history in Korea. In order to extend the usage of this one of the most important natural dyes, its dyeability on wool fabrics has been studied to find out the optimum dyeing condition for wool fiber which is susceptible to alkaline medium. The dyeing method used was hydrosulphite vat of extracted dye. K/S values of dyed fabrics were investigated to analyze the dyeability of natural indigo on wool fibers and colors were measured through $L^*,\;a^*,\;b^*$ and Munsell Values. Highest K/S values were obtained at the temperature of 60(C and pH 7 to 8. The Munsell Values for hue of wool fabrics dyed with extracted indigo powder using hydrosulphite vat fell mostly in PB range. As the dyebath pH increased, blueness increased. Different dyeing conditions resulted in change of colors of dyed fabrics due to the difference in amounts of indigotin and indirubin contents within the dyed fiber as shown by HPLC.

• Fashion & Textile Research Journal
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• v.3 no.2
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• pp.168-173
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• 2001

In order to overcome the disadvantage of the conventional two bath dyeing method of wool/cotton blends, it had prompted significant effort to the development of the one bath dyeing method which can accomplish savings in energy, water usage and time. To improve the dyeability of cotton toward direct dyes in a non-electrolytic and acidic dyebath, cotton component was pretreated with cationizing agent containing chlorohydrine group in aqueous solution of sodium hydroxide. This study was carried out to investigate almost equal color strength between wool component and cationized cotton component when wool/cationized cotton blends was dyed with acid dye/direct dye by the one bath two step method in a non-electrolytic and acidic dyebath.

• Journal of Fashion Business
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• v.9 no.5
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• pp.122-135
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• 2005

It has been reported that natural dyeing is impossible without pre-treatment with metal mordanting agents. However, pre-treatment with chitosan, which has high affinity to natural dyes, could result in an excellent dyeing with various natural dyes. In this study, three treatment methods were employed; 1) Using PET without any pre-treatment (Method 1) 2) Using PET with chitosan acid solution pre-treatment (Method 2) 3) Using PET with chitosan pre-treatment and subsequent crosslinking using citric acid (Method 3) Method 2 and 3 enhanced the Cochineal dyeability remarkably compared to Mehod 1. Washfastness was also enhanced, and moisture content, static property, abrasion resistance, and fabric hand changes were investigated.