• Fibers and Polymers
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• v.7 no.4
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• pp.344-351
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• 2006

This paper is intended to determine the optimal processing parameters applied to the dyeing procedure so that the desired color strength of a raw fabric can be achieved. Moreover, the processing parameters are also used for constructing a system to predict the fabric quality. The fabric selected is the nylon and Lycra blend. The dyestuff used for dyeing is acid dyestuff and the dyeing method is one-bath-two-section. The Taguchi quality method is applied for parameter design. The analysis of variance (ANOVA) is applied to arrange the optimal condition, significant factors and the percentage contributions. In the experiment, according to the target value, a confirmation experiment is conducted to evaluate the reliability. Furthermore, the genetic algorithm (GA) is combined with the back propagation neural network (BPNN) in order to establish the forecasting system for searching the best connecting weights of BPNN. It can be shown that this combination not only enhances the efficiency of the learning algorithm, but also decreases the dependency of the initial condition during the network training. Most of all, the robustness of the learning algorithm will be increased and the quality characteristic of fabric will be precisely predicted.

• Journal of the Korean Society of Clothing and Textiles
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• v.38 no.1
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• pp.110-122
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• 2014

This study examined hwangbek dyeability for cotton, silk, and wool from different tree species and origin as well as their berberine and palmatine content. A total of 12 different hwangbek were examined, six purchased directly from different locations of China and six purchased from the Seoul Medicine Market. Hwangbek purchased from China were 3 Kwanhwangbek (Phellodendron amurense Rupr.) from Jilin, Liaoning, Heilongjiang and 3 Chunhwangbek (Phellodendron chinense Schneid.) from Sichuan, Yunnan, and Guangxi. Hwangbek purchased from the Seoul Medicine Market included 3 hwangbek that originated from Korea and 3 hwangbek imported from China. We extracted 2.5g of each hwangbek into 500mL of water for 60 min at $80^{\circ}C$. Dyeing was conducted using the IR dyeing machine for 30min at $55^{\circ}C$ using a 1:100 liquor ratio. Cotton was mordanted using tannic acid followed by potassium antimonyl tartrate trihydrate treatment before dyeing. Berberine and palmatine pigments in hwangbek were identified with the HPLC-DAD-MS instrument and the amount of pigment was quantified using an ion chromatogram. The results indicated that the K/S values of dyed fabrics were highly related to the amount of pigment in hwangbek used for dyeing.

• The Research Journal of the Costume Culture
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• v.16 no.1
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• pp.158-165
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• 2008

The purpose of this study was to investigate the dyeing property and ultraviolet-cut ability on silk 100% and nylon 100% fabrics dyed with Rhus verniciflua extracts. This study was investigated K/S values, surface color, washing fastness, dry cleaning fastness and ultraviolet-cut ability of the silk and nylon fabrics dyed with Rhus verniciflua extracts under the various dyeing conditions. As mordanting were used Tin(II) Chloride dihydrate $(SnCl_2{\cdot}2H_2O)$, Copper(II) sulfate pentahydrate$(CuSO_5{\cdot}5H_2O)$, Iron(II)Chloride$(FeC_2{\cdot}4H_2O)$. pH was adjusted by sodium carbonate$(Na_2CO_3)$ and formic acid(HCOOH). The optimum dyeing temperature, dyeing time, and pH of the silk fabrics dyed with Rhus verniciflua extracts were $90^{\circ}C$, 100min, and in the nylon fabrics were $90^{\circ}C$, 45min. It were colored(munsell value) 6.4Y 7.5/4.1 in the silk fabrics and colored 4.3Y 6.6/5.9 in the nylon fabrics dyed with Rhus verniciflua extracts. Washing fastness and dry-cleaning fastness in the silk and nylon fabrics dyed with mordanting agent improved in $4{\sim}5$ grade. UV-A test showed that nylon fabrics a high rate of 92% with Rhus verniciflua extracts.

• Fashion & Textile Research Journal
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• v.7 no.3
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• pp.327-332
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• 2005

The purpose of this study is to investigate the effect of chitosan treatment on the dyeing of cotton fabric specimens using loess as colorants. The wet pick up ratio of the chitosan acid solution, as well as the drying condition after the padding of the fabric specimens, was changed in order to study the loess uptake on the fabric. The average particle diameter of the loess was measured. Main components of the loess were $SiO_2$, $Al_2O_3$, and $Fe_2O_3$. By the chitosan treatment, the loess amount on the cotton fabric increased. 80% wet pick up ratio of the chitosan acid solution on the cotton fabric specimen allowed more stable and even adhesion of the loess on the fabric surface, compared to the cases of 100% and 120% wet pick up ratio.

• Textile Coloration and Finishing
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• v.23 no.2
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• pp.69-75
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• 2011

A pre-treatment process has been developed for natural dyeing of wool by which the dyed materials have been imparted antimicrobial efficacy against both gram-positive and gram-negative bacteria durable up to 20 washes. In this process, wool fabrics were treated with citric acid under oxidizing condition prior to dyeing. The treated fabrics were then dyed with four different types of natural dye powders obtained from leaves of silver oak, wattle, tanner's senna and flame of forest. All the natural dyes produced yellowish brown colour on wool fabrics. The washing and light fastness properties of the fabrics subjected to pre-treatment were one grade higher compared to those of the dyed fabrics without pre-treatment. The pre-treated wool fabrics showed antimicrobial efficacy against both gram-positive bacteria (Staphylococcus aureus) and gram-negative bacteria (Escherichia coli). The fabrics dyed without pre-treatment showed antimicrobial efficacy against gram-positive bacteria (Staphylococcus aureus) only. The durability of antimicrobial efficacy was higher in pre-treated and dyed wool fabrics compared to the dyed fabrics without pre-treatment.

• Journal of the Korean Applied Science and Technology
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• v.38 no.5
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• pp.1273-1281
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• 2021

The purpose of this study was to increase the power of color and examine the long-lasting power, which is a disadvantage of one-pack acid hair dye by using chestnut shell pigment. For this, hair dyeing power was measured using a spectrophotometer, the optical density(O.D.) value was measured to examine the degree of fading of the hair, and the elasticity of the hair was analyzed by measuring the tensile strength. As a result of comparing the results of applying different leaving times and treatment methods to the hair samples of each level, the experimental group that was heat-treated for 20 minutes showed the highest dyeing power. Then, it was confirmed in the order of 40 minutes of natural exposure, 10 minutes of heat treatment, and 20 minutes of natural exposure. And it was also confirmed that the color expression visually improved as it went up to level 10. However, at level 10, it was confirmed that some water loss occurred even after 3 days and the tensile strength was low. These findings that indicated the beauty industry will popularize a one-step acid hair dye containing various natural dye ingredients to help maintain modern people's well-being and healthy mind and body.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.12
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• pp.23-32
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• 2020

This study investigated the thermal degradation and fading behavior of PTT dyed with vat dye and its dyeing ability. The PTT sample was dyed with vat dye using an acid treatment and pad-steam method to improve the dyeing performance. This method made dye particle nanosize and allowed it to penetrate the polymer material easily. The sample dyed using the pad-steam method showed level dyeing and enhanced dyeing affinity, compared to the batch-dyeing method. The degradation behavior of PTT dyed with vat dye after each heat and UV treatment was examined with the change in tensile strength or K/S value on the sample. The tensile strength and K/S values of the sample dyed with vat dye after the heat and UV treatment decreased with increasing temperature and exposure time. Although they showed high degradation under severe conditions, its rate constant was improved compared to the samples dyed with disperse dye. Consequently, acid treatment and the pad-steam method resulted in the introduction of vat dye on PTT. In addition, the PTT dyed with vat dye showed enhanced thermal and UV resistance because of their high molecular weight and chemical structure for stable adsorption behavior.

• Textile Coloration and Finishing
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• v.8 no.2
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• pp.8-15
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• 1996

This research was attempted to improve the hydrophilicity of polypropylene(PP) by using low temperature plasma polymerization of acrylic acid(AA) as a starting material. The results of the present study were as follows: The PP films deposited with AA plasma polymer showed excellent hydrophilicity, that the polar parts were about 20 dyn/cm, and also that the surface tensions were about 55 dyn/cm, whereas the disperse parts were not changed. Work of adhesions of the PP films deposited with AA plasma polymer were above 100 erg/ $cm^{2}$. AA plasma polymer formed by low temperature plasma polymerization of acrylic acid(AA) was even thin layer which contained many -OH groups.

• Textile Coloration and Finishing
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• v.5 no.2
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• pp.91-98
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• 1993

The silk fabrics were treated with color solution extracted from leaf of Camellia. The depression effect of destruction and yellowing of silk treated with color solution, shift of UV-VIS spectra of color solution, color difference of silk fabrics by dyeing with acid dyes and drycleaning fastness of silk treated with color solution were studied. UV-VIS spectra appeared to hypsochromic shift by irradiation. The decrease of tensile strength and the elongation of the silk treated with color solution showed depressed but those of untreated silk increased by irradiation. The yellowness index of silk treated with color solution showed a little change by irradiation. The color difference after dyeing with several acid dyes on treated and untreated silk showed not remarkable changes. Dsrycleaning fastness of silk treated by color solution was excellent.

• Journal of the Korean Society of Clothing and Textiles
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• v.20 no.3
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• pp.429-437
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• 1996

This paper surveys extraction condition-temperature, pH, and changes of adsorbance in accordance with extraction condition of curcuma Longa L. solution. Using extracted curcuma Longa L. Solution, dyeing behaviors with natural fiber, effect of mordants to color fastness and color change were investigated. It was found that the amount of absorption (K/S value) was increased by mordants (Fe, Cr) and mordants treatment affected color change of dyed fabric. Among the mordants, effect of citric acid to color change of dyed fabric was the smallest, and color difference of post- mordant treatment is smaller than that of pee-mordant treatment in making use of citric acid as mordant. And K/S value of post mordant was higher than that of pre mordant. It was found that the pre - and post- mordants treatment little affected color fastness, but affected the amound of adsorption and color change of dyed fabric.