• 한국염색가공학회지
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• 제15권6호
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• pp.47-54
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• 2003

To be dyed with cationic Berberine, the cotton fiber was modified with reactive anionic agent. The Berberine, a natural cationic colorant of pure yellow, is the major component of Amur Cork tree extract and also can be employed as a natural antimicrobial agent due to its characteristic of cationic quaternary ammonium salt. By LC/MS analysis, it became obvious that the Berberine was contained in Amur Cork tree extract as a major color component. The adsorption of the Berberine on the cotton fabrics pretreated with the anionic agent was greatly increased comparing to that of untreated fabric. Because the anionic agent was colorless, it did not cause unintended color change of the dyeings. The dyed fabric with the Berberine has strong antimicrobial activity showing 99.5% of reduction of bacteria against Staphylococcu aureus.

• 한국염색가공학회지
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• 제23권3호
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• pp.187-194
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• 2011

This study used Jeju scoria to dye cotton fabric and measured its dyeability, colorfastness, antibacterial activity, deodorization efficiency, ultraviolet protection, and far-infrared emission. The cotton fabric was colored to yellowish red and optimal dyeing can be achieved at a temperature of $80^{\circ}C$ for a dyeing time of 120 minutes with a colorant concentration of 25%(o.w.b). The colorfastness to light, rubbing, perspiration, and washing was 8, 5, 5, and 4~5 ratings respectively, where the wash colorfastness remained after 15 wash cycles. The cotton fabric dyed with Jeju scoria demonstrated excellent antimicrobial activity to Staphylococcus aureus and high deodorization efficiency. Ultraviolet protection factor was as high as 50+. The Jeju scoria can be used as a new colorant for the natural dyeing of silk.

• 한국염색가공학회지
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• 제22권4호
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• pp.314-324
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• 2010

The purpose of this study is to obtain the dyed-fabrics of the elaborate patterns using the natural dye powders extracted from Galla Rhois, Sophorae Flos Immaturus, Clove, Sappan Wood, Madder, Log Wood and Japanese Green Alder. Specific informations on the separation and powder-making of each colorant were disclosed. Appropriate printing paste preparation and printing conditions including the viscosity and mordant concentration in the printing paste were investigated. The dyeability and colorfastness of the screen-printed silk fabrics with the colorant powders were discussed in terms of practical applicability. The deodorization and antimicrobial activities of the silk fabrics screen-printed with natural dyes were also assessed.

• 한국전기전자재료학회논문지
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• 제25권2호
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• pp.140-146
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• 2012

A variety of dyes are commercially available today, there is an ongoing need for new chromophoric systems and low-band-gap materials. For example, near-infrared (NIR) emission has received increased attention for applications in bioassays and medicine while NIR absorption is demanded for laser-welding of plastics or efficient blocking of heat rays. Most of the commercially available NIR materials are not suitable for such purposes owing to their insufficient stability. We have developed a novel NIR-absorbing polyaromatic dye. By extending the system of perylenebis(dicarboximide)s along the molecular long axis, we have obtained the higher homologue pentarylenebis(dicarboximide). We have tried to introduce imide functional group to pentarylene in order to increase chemical and thermal stability.

• 자원리싸이클링
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• 제11권5호
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• pp.24-29
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• 2002

철강압연공장에서 산세공정중 발생하는 산화철의 색상을 개선하기 위하여 배소로 조업과 색상혼합공정을 연구하였다. 배소로 조업에서는 조업온도, 폐산장입량, 폐산분사 노즐수에 대하여 검토하였으며, 색상혼합공정에서는 산화티탄, 실리카, 괴타이트를 색상혼합재로 검토하였다. 배소로 조업에서는 조업온도를 낮게 할수록 산화철의 명도가 개선되었으며, 색상혼합공정에서는 괴타이트 첨가 경우에 제일 많이 산화철의 적색 및 명도가 개선되었다.

• 한국의류학회지
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• 제21권2호
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• pp.406-413
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• 1997

The dyeability and colorfastness of browning extracts from mushroom were investigated. The results of this study are as follows, 1. Browning extracts from mushroom exhibited dyeability to wool, nylon and silk. The wool and silk had the greatest K/S value at pH 4 and nylon at pH 5 2. Furthermore, the increase in K/S value corresponded to temperature, time, and the number of dyeing. 3. In most cases, the value of K/S was increased by mordant treatment. The treatment of pre-mordant caused the increase in K/S value depending on the concentration of mordant, but not in the color. Co.mordant and post-mordant treaments, however, showed various colors of YR, Y, and GY types of Munsell color wheel. 4. In the most cases, color fastness of light, drycleaning, laundry, sweat, rubbing was excellent.

• 한국대기환경학회지
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• 제18권5호
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• pp.383-391
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• 2002

Six types of ozone passive samplers were fabricated with three different filter substrates and two colorants, and tested for their feasibility on atmospheric monitoring. These passive samplers are based on a colorant which fades (indigo carmine and ChromAir (K&M environmental Inc.)) or produces color (mixture of 3-methyl-2-benzothiazolinone acetone azine and 2-phenylphenol colorant) upon reaction with ozone, whose concentration can be determined by reflectance measurement of the color change. Three filters, namely Whatman No.1 paper, SG81 chromatography paper and Silica Gel coated on polyester (TLC Plates), were prepared and coated with two colorants. The response of these passive samplers in ozone chamber were tested and compared with ChromAir (K&M environmental Inc.) passive sampler. The response of Silica Gel filter impregnated with indigo carmine was the best at the constant concentration exposure.

• 한국의류산업학회지
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• 제3권1호
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• pp.31-34
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• 2001

The color difference values of dyed fabrics with colorant in Eucommiae Cortex were as follows; One hour of dyeing depending on pH at $95^{\circ}C$ exhibited colors of dark brown, light brown, light beige and grey. The colors of wool, nylon and silk was darkest brown at pH 3 but light brown or yellow as pH increased. In all dyed fabrics the color was changed to darker brown as time prolonged, however; there was no further color change and value and chroma of wool declined. At pH 3, the increase in temperature turned colors of all dyed fabrics into dark brown from light yellow. As the result of repetitive dyeing, colors of all dyed fabrics gradually turned into darker brown. The methods of mordant resulted in color changes between light yellow and dark brown without various color changes.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
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• pp.144-148
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• 2001

In this study, to improve the color of iron oxide from waste pickling acid at the cold rolling mill, quality control technologies to improve color were investigated. During operation of the spray roaster, the charge amount of waste acid per hour, temperature, and numbers of spray nozzles were investigated. At the admixing process, titanium oxide, silica, and goethite were tested. The color character of iron oxide can be improved by process control of the spray roaster and the admixing process at a pigment factory. Iron oxide from this study is appropriate for use as a colorant of a concrete product.

• 대한가정학회지
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• 제39권3호
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• pp.83-91
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• 2001

The dyeability of the Eucommiae Cortex were examined to establish the optimum condition for dyeing of Eucommiae Cortex. The results of this study are as follows, Wool, nylon and silk had the highest K/S value at pH 3. The dyeability was the highest in wool, nylon, and silk. In addition, the increase in K/S value corresponded to temperature in wool, nylon and silk, and the greatest K/S value at 95$^{\circ}C$. The increase in K/S value corresponded to dyeing times in wool, nylon and silk, and the greatest K/S value at 120min. Also, the K/S value increased in concomitance with the increased number of dyeing repetition. In the most cases, colorfastness of light was low but colorfastness of laundry, sweat was relatively good.