• Textile Coloration and Finishing
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• v.27 no.1
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• pp.80-95
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• 2015

In this study, the properties such as color, dye uptake and antibacterial function were examined through the application of combination dyeing and mixed dyeing with extracts from Humulus japonicus(hwansam) and the pruned branches of Prunus persica(peach) tree. In terms of dye uptake and surface color changes subject to the kind of mordants, methods and mixing ratio of dye, it was found that fabrics dyed by the pre-mordanting method with $CuSO_4$ showed the red green yellow group colors, which were not seen in fabrics dyed with hwansam only. Color fastness was found strong at grade 4-5 with 96.3% of UV protection ratio. While the fastness to light was as fair as grade 3, it showed an excellent result of 99.9% bacteria reduction rate against Staphylococcus aureus with fair 58% deodorization rate and 21.2% antibacterial rate against Klebsiella pneumoniae. As stated above, the combination and mixed dyeing resulted in the meaningful outcomes with regard to color variations, dye uptake, color fastness and functional properties.

• Journal of the Korean Society of Clothing and Textiles
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• v.19 no.1
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• pp.51-56
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• 1995

Cotton fabric was treated with acrylonitrile in t-butyl alcohol and then aminized by reduction of the resultant cyanoethyl cellulose with LiAIH4, under various temperatures and times. Aminized cotton fabric toras dyed with acid and reactive dye. Dyeability as to temperatures, pH, and color fastness were compared to the amiRe group content of treated cotton fabrics. The results of this study were as follow: 1. D.S of cyanoethyl cellulose has been increased by increasing treating temperatures and times. Maximum D.S of cyanoethyl cellulose was 1.45. By SEM and the tensile strength, the damage of the treated cotton was not observed. 2. Since aminized cotton has greater affinity on acid dye than untreated cotton, dyeability increased with the increase of amino group content, and the lower pH, $60^{\circ}C$. 3. Since amino group in aminized cotton changes surface charge of cotton, dyeability for reactive dye increased by increasing the amino group content. Optimum dyeability was obtained at pH 5-7, $40^{\circ}C$. And dyeability of the amine treated cotton increased with the NaCl conc. 4. Color fastness to washing & light of the amine treated cotton was very low except for the wash fastness of the reactive dye.

• Textile Coloration and Finishing
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• v.21 no.2
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• pp.22-28
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• 2009

Human hair is a kind of fibrous keratin which has much cystine residues like wool fiber. It protects human head from the dangerous shock and is an organ to release heavy metals in human body. Recently, in many dyeing field there is a trend to utilize the natural dyes. Cochineal is a reddish natural mordant dye. When the cochineal is applied in human hair dyeing, it is expected that dyeing rate will be slow and wash fastness will be poor on account of large molecular weight relative to oxidative dyes. In this work, we investigated the effects of tributyl phosphate in hair dyeing with natural dye cochineal. Dyeability of hair increased significantly by adding tributyl phosphate in cochineal dyeing. Nevertheless the hair was slightly damaged during dyeing, the dyed hair showed a good wash fastness.

• Journal of Fashion Business
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• v.18 no.5
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• pp.69-81
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• 2014

Fabric made of 100% silk was dyed with Undaria pinnatifida extracts under different conditions such as varing colorant concentration, temperature, time and dyebath pH. The dye uptake (K/S, value), CIE L*,a*,b* and Munsell values of the dyed samples and mordanted samples were measured. Colorfastness, antibacterial property and UV protection property were also evaluated. As colorants concentration increased, the dye uptake increased progressively and maximum color strength was obtained at 100% V/V. Dye uptake also increased with increasing temperature and time, and the maximum color strength was obtained at $80^{\circ}C$ and 60min. With pre-mordanting, the color of the Al and Fe mordanted silk fabrics was yellow on the Munsell color system, while the Cu mordanted fabric was a greenish color. Al and Fe post-mordanted fabrics had a yellow tone, and the Cu post-mordanted fabric had a yellow greenish tone. The light fastness property of the Cu mordanted silk fabric was relatively good, The effect of Al and Fe mordanting on fastness was insignificant. The antibacterial activity of dyed and unmordanted silk fabric was excellent, whereas fabric dyed and mordanted with Undaria pinnatifida extract demonstrated superior ultraviolet protection.

• Journal of Fashion Business
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• v.20 no.4
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• pp.128-140
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• 2016

In this study, dyeability of Urtica Dioica L. extract, which is relatively less studied, was measured. The extract of this plant was used to dye cellulose and protein fiber to check its usage as a natural green dye. Three different methods were used to produce extract. Dried Urtica Dioica L. was extracted with 100% ethanol, 50% ethanol with 50% distilled water and 100% distilled water. Then dyeing solution was obtained by blending with distilled water at 1-to-1 ratio. The maximum dyeability was obtained when 100% ethanol extract of dried Urtica Dioica L. used to dye fabrics at 60 degrees celsius for 60 minutes without mordant treatment. Cotton, rayon, wool and silk were dyed and dyeability for each fiber was measured for color difference value then compared to its control. The results show that dyeability of rayon and dyeability of wool are stronger, and that when color position for each mordant is measured, color difference is most diverse on cotton with pre-mordant treatment. Color fastness to wash, perspiration and rubbing crockmeter were superb, but color fastness to light was low, therefore, additional study on this is needed to improve. Urtica Dioica L. is now expected to be used practically as green color dye as well as medicinally and edible.

• Journal of the Korean Society of Clothing and Textiles
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• v.9 no.2
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• pp.75-84
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• 1985

In order to improve dyeing and finishing technology of thin cloth of microfiber(super-fine fiber), the degrees of deep dyeing method, the light fastness, and the washing fastness were investiagted. 1. The thin cloth made of microfiber, $0.15^d\~0.2^d$, was conjugated type and the dyeing degree was lower at 5 to $10\%$ than that of cloth made of common fiber. The cloth of excellent dyeing fastness, light fastness, was developed by increasing the concentration of dye of high quality up to $5\~10\%$. 2. Because refractory rate of microfiber of $0.2^d$ was lower than that of $0.01^d$, the surface refractory rate of $0.2^d$ was lower than that of $0.01^d$ fiber. Therefore the surface of micro-fiber, $0.2^d$, was more rougher than that of $0.01^d$ and it belongs to separate type. 3. The higher degree of dyeing was increased by using dye of microparticle. Also the degree of textile printing was increased by adding urea solution ($20\%$) and glycerine diethylene glycol. 4. Light fastness was very excellent, marked 5 grade. However, washing fastness was 2$\~$3 grade. After dyeing, we could improve to 4 grade, through hot water washing including some organic chlorine solvent. 5. Super microfiber of $0.01^d$ will not be dyed by present dye and dyeing equipment, because right reflection light rate(white light) of fiber surface was too high and the more refraction rate higher the more surface refraction rate will be increased.

• Fashion & Textile Research Journal
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• v.13 no.3
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• pp.438-444
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• 2011

Bamboo leaves, as natural dye provide unartificial fresh green, are known for expert property at anti-bacterial, anti-aging, anti-oxidation, skin whitening, moisturizing, peeling of horny, deodorizing and some skin disease like as eczema and inflammation without any allergic response. Also, It is quite common to obtain bamboo leaves from our surrounding but most of them were not in use. On purpose of development the way of recycle with common material to dye, bamboo leaves were used to dye on ramie fiber which is valuable for both of apparel and industrial field and investigated their dyeing property. Using extract from bamboo leaves, dyeing property was examined with dyeability, colorimetric property, light fastness and wash fastness under different conditions by extract density, dyeing time, dyeing method and mordants. As results, dyeing was generally colored in yellowish, K/S Value was shown more higher on hemp fiber than ramie. The most optimum dyeing condition was investigated on pre-mordant treatment, dyeing temperature $60^{\circ}C$, dyeing time 30min and extract density 400%. On the treatment with mordant(Al, Fe, Cu), dyebility on both of hemp and ramie fiber were increased by mordant. Especially with Copper(Cu) as mordant, dyebility was highly increased than any other mordants and dyeings showed in deep color. Also on the fastness test which is the most important to natural dyeing, wash-fastness showed good performance with 4-5 grade but light-fastness was above 4 grade on both of hemp and ramie fiber, lower than wash-fastness overall.

• Textile Coloration and Finishing
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• v.27 no.1
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• pp.27-34
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• 2015

Novel super hydrophobic disazo red dyes were synthesized to improve light fastness of the primary monoazo red dye of previous study on polyolefin fibers such as polypropylene and ultra high molecular weight polyethylene fibers. 4-Alkylanilines were diazotized and then coupled to 2,5-dimethylaniline to produce dye intermediates which were then further used to synthesize final disazo red dyes by diazoization and coupling to ${\beta}$-naphthol. Considering both affinity of the dyes toward both polyolefin fibers and color fastnesses, the decyl-substituted dye was determined as the optimum dye. The decyl-substituted disazo red dye exhibited good dyeability on both polyolefin fibes and almost the same color values as the previous primary monoazo red dye. Light fastness on ultra high molecular weight polyethylene fibers was improved up to rating 3~4 compared to rating 2~3 of the previous primary monoazo red dye.

• Textile Coloration and Finishing
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• v.27 no.2
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• pp.105-112
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• 2015

In order to detect gas phase strong acid on fabrics, a hexyl-substituted monoazo yellow dye, which was the modified form of a conventional pH-indicating dye, Methyl Yellow, was studied in view of acid-gas sensing properties and its fastness. The dye was printed on polypropylene non-wovens for protective coveralls and examined under various conditions of strong acid such as hydrochloric acid. The dye showed color change from yellow to red on exposure to gas phase hydrochloric acid as low concentration as 1~3 ppm very instantly. Considering reuse of the dye-printed non-wovens, the repeatability of color change was tested on the same sample for 50 repeats and 100 days. The acid-gas sensing function was maintained almost the same level of initial performance. The color fastness of the dye on polypropylene non-wovens was very good showing higher than ratings 4 except for 3~4 to rubbing under wet condition.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2008.04a
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• pp.83-85
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• 2008

Dyeing and fastness properties of direct spun type PET microfiber have been compared with those of regular PET fiber and PET-Nylon conjugated microfiber. The dye uptake of finer microfibers commenced at lower temperatures and showed faster rate of dye uptake. The build-up and wash fastness properties of disperse dyes on direct spun type PET microfiber were relatively better than split type PET-Nylon microfiber.