• Journal of Fashion Business
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• v.9 no.3
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• pp.114-124
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• 2005

Based on the previous study, three types at synthetic fibers comprising nylon, PET, and acrylic fibers were investigated in this study. The effect at mordanting on the air-permeability and dyeing properties at fabrics was investigated. The effect at rinsing process on the air-permeability and color was quantitatively investigated by rinsing the mordanted fabric specimens 1$\sim$3 times after mordanting. The air-permeability changed peculiarly according to the characteristics of the tiber materials after mordanting. The air-permeability values of nylon and acrylic fabric specimens dropped significantly after mordanting. On the other hand, those of PET fabric specimens hardly changed after mordanting. The metal ions absorbed on the fibers of nylon and acrylic fabrics did not show the mordanting effect. Regardless of mordanting, cochineal dyestuff made direct links with the molecular chains in nylon fabrics exhibiting dark colors. After dyeing acrylic fabrics, the color did not develop at all, even though partial components of the cochineal dyestuff were absorbed apparently.

• Journal of the Korea Fashion and Costume Design Association
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• v.10 no.2
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• pp.1-10
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• 2008

Yellow, one of the five direction colors, is a prevailing color in artificial dyeing. The color has implied and symbolized wealth and power since ancient times. Yellow has been extracted mainly from flowers. Shapes, colors and scents of flowers not only have enriched emotional mentality, but have also been used for medicinal herbs, and dyestuff since the very old days. Coloring matter from flowers is very beautiful, and it has been used for dyeing textiles. Textile dyeing have formed a color culture and developed a dyeing culture since ancient times. Flowers include a variety of color matters, and can be easily obtained around us. Therefore, flowers have been a widespread natural dyestuff. It is well known that beautiful colors can be extracted from flowers, which are eco-friendly and non-polluting. In addition, flowers are easily provided. In this study, yellow wild flowers were selected as subjects. Seven flowers with color matters distiguishable through the naked eye were used: Korean forsythia, golden-wave, Mongolian dandelion, sunflower, conflower, chelidonium and chrysanthemum. Coloring matters were extracted from the seven flowers, which have been used to create a variety of colors through various dyestuffs; and the colors have been analyzed and presented. Dyeing and coloring matters were tested and analyzed, and several types of dyestuff had also been scientifically measured after treatment.

• Journal of the Korean Wood Science and Technology
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• v.49 no.2
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• pp.134-141
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• 2021

This study was conducted to investigate the potential of the neutral extract (NE) prepared by treating P. radiata bark with aqueous NaHCO3 solution as a natural dyestuff. Silk and cotton fabrics were dyed at four different NE concentrations, 0.5%, 1.0%, 1.5%, and 2.0% o.w.b. (on the weight of bath). The fabric to liquid ratio of 1 : 50, dyeing temperature of 90℃, and dyeing time of 90 min were used as the fixed condition. The appropriate NE dyeing concentration of silk and cotton fabrics was 1.5% o.w.b. Colors of the dyed silk and cotton fabrics were brown and light brown, respectively. From colorfastness assessment, both dyed silk and cotton showed good washing and rubbing fastness, but poor light fastness. NE dyed fabrics exhibited excellent ammonia deodorization property and antibacterial activity against Staphylococcus aureus and Klebsiella pneumoniae. Therefore, NE of P. radiata bark could have the potential for use as a functional brown dyestuff.

• Information Display
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• v.2 no.6
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• pp.29-35
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• 2001

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2004.08a
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• pp.25-59
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• 2004

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2004.08a
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• pp.61-95
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• 2004

• Journal of the Korean Society of Clothing and Textiles
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• v.22 no.4
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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.

• Journal of Fashion Business
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• v.10 no.5
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• pp.180-189
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• 2006

Mercerization of cotton fabrics affects their various properties including physical properties and dyeing behavior. In this study, the concentration levels of NaOH solution, with 18% and 25%, and the mercerization temperature levels, $22^{\circ}C,\;10^{\circ}C$, and $5^{\circ}C$, were changed in order to investigate the physical properties and dyeing behavior using Gardenia, a natural dyestuff, and direct dyes. The effect of tension during the mercerization was also investigated. In order to investigate the dyeing behavior of Gardenia, a direct dyestuff was employed as a comparative material for better objective analysis and evaluation. It was found that the mercerization condition of 18% NaOH concentration at $10^{\circ}C$, without tension, resulted in the highest ${\Delta}E$ value, when dyed with Gardenia.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2003.04a
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• pp.29-31
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• 2003

The 1,3-bis(4-aminoaryl)squaraines showed colour change behaviour, they were found to undergo reduction with sodium borohydride in solution to give colourless leuco compounds, which oxidised readily in air back to the coloured squaraine dye. We have shown that oxidation of the parent leuco-squaraines gives the neutral squaraine system. Initial observations indicated that the derivatives gave new long-wavelength absorbing chromophores, and It is interesting to note that the onidation of the leuco squaraines did initially produce a species absorbing at longer wavelengths than the parent squaraine dye. This colour-change redox behaviour has potential in the area of peroxidase-based bioassays and artificial camouflage.

• Journal of Environmental Science International
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• v.7 no.1
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• pp.74-80
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• 1998

Because permeate flux was very low as It has the suspension soled of higher concentration In the trafiltration membrane separation treatment of dyestuff wastewater, pre-treatment of Ponton reaction was carried out. In the case of pH 3, COD removal rate was the hi각erst of 58%. When PAC was added into the pre-treatment supernatant, the COD removal rate was found to be 53% , and when COD was 153mg/L, the removal rate was 92.3% in the trafiltration separation. In addition, the effect of the addition of PAC on the permeate flux was also investigated. The decrease of permeate flux In the presence of PAC was higher than In the abscence of PAC, but the recovery of permeability by cleaning was better In the case of PAC system.