• Journal of the Korean Society of Clothing and Textiles
• /
• v.26 no.1
• /
• pp.124-132
• /
• 2002

Dyeing properties of silk fabric on gromwell roof colorants were studied for the effect of dyeing conditions, such as methanol ratio, colorants concentration, pH, temperature and time etc. on the dye uptake and effect of mordants and mordanting methods on color change and dye uptake. And various colorfastnesses of dyed fabrics were evaluated far practical use. Gromwell colorants showed high affinity to silk and its isotherm adsorption curve was Freundlich type close to Nernst type. Therefore, it is considered that hydrogen bonding and Van der Waals force were involved in the adsorption of cromwell colorants to silk fabric. Post-mordanting method gave higher K/S value than other methods, but it was not significantly different color values from unmordanted one. Gromwell colorants produced mainly R and RP color depending on mordants and mordanting method. Dyed fabrics showed high colorfastness irrespective of mordanting treatment. Light colorfastness was increased for repeatedly dyed and Fe mordanted dyed fabrics.

• Textile Coloration and Finishing
• /
• v.11 no.5
• /
• pp.30-37
• /
• 1999

The extracts drawn out from Artemisia princeps by water was concentrated. Using this concentrate the silk and the cotton fabrics were dyed, and they were measured with the K/S value, surface color and mordant quantity in order to evaluate the dyeability and the antimicrobial activity. The results are as follows; 1. The K/S value of the silk fabric was much higher than that of the cotton fabric. And the color yield of the dyed silk fabric was most efficient for the premordanting method. 2. The surface colors on the dyed fabric depended heavily upon mordants used or mordanting methods. For all cases, the value of the dyed fabric was generally dark. For the Cr-mordant among various mordants, the chroma produced clear and the color difference was distinct when using the Fe-mordant. 3. On the other hand the amount of absorbed mordant in the silk fabric was larger than that of the cotton fabric. And the Cu-mordant was most efficient. 4. The color fastness was significantly improved when mordants were added. Cr-mordant improved best in all of the dry cleaning, wet cleaning and perspiration fastness. Iron and abrasion fastness showed over 4-5 grade regardless of any mordant. And light fastness was best in Cu-mordant. 5. The Cu-mordant showed the greatest antimicrobial activity in both of mordant treat silk and cotton fabrics.

• Journal of Fashion Business
• /
• v.9 no.1
• /
• pp.57-66
• /
• 2005

In natural dyeing, a number of supplementary methods have been practiced since deep shades of the dyed fabrics are not developed satisfactorily. The methods include using the mordants effectively or subjecting the fabrics to reiterated dyeing processes. In this study, we obtained deep shades in the dyeing of fabrics using Rhusjara ica as the dyestuff and applied chitosan to the fabric specimens in order to diversify the colors. Silk fibers and PET(polyethylene terephthalate) fibers were pretreated using chitosan, and subsequently dyed using different types of mordants. As the mordanting agents, Al, Sn, and Fe were employed. Various shades have been resulted in since the interactions of the mordants are different toward the silk fibers and PET fibers. In this study, we investigated the effect of the chitosan treatment along with the change of the mordanting agents on the color change for the silk and PET fibers.

• Textile Coloration and Finishing
• /
• v.26 no.3
• /
• pp.263-271
• /
• 2014

The purpose of this study is to investigate the dyeability of silk fabrics with Humulus japonicus (Hwansam) extract which is a kind of weeds that grows wild in the suburbs. In the research, the general extract method was conducted with the extract from fresh herb of root-removed Humulus japonicus while we investigated the optimal dyeing conditions and dyeability depending on the changes of the kind of mordants, methods and temperature. The functional properties such as antibacterial activities, deodorization and UV protection were also reviewed. The ideal output, as a result, was shown at 100% of dye concentration, $90^{\circ}C$ of dyeing temperature and 40 minutes of dyeing time while in terms of dye uptake depending on the kind of mordants and methods, it was found that among four mordants of $SnCl_2$, $AlK(SO_4)_2$, $CuSO_4$, and $FeSO_4$ post-mordanting with $FeSO_4$ showed the best result. Color fastness to washing, dry cleaning and rubbing was found strong at grade 4-5 and the grade to light was as good as 3 while to perspiration was good at 4-5 as well. In aspects of functional properties, it showed excellent results of 99% deodorization rate, 98% UV protection rate and 99.9% bacterial reduction against Staphylococcus aureus.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.23 no.3
• /
• pp.385-390
• /
• 1999

Dyeing properties of silk fabric with green tea colorants were studied by investigating the effect of dyeing conditions such as concentration pH dyeing temperature and time on dye uptakes and effect of mordants on color change and dye uptakes, And various colorfastnesses of dyed fabrics were evaluated for practical use. Green tea colorants showed relatively good affinity to silk fabric and produced yellowish red color. Langmuir adsoption isotherm was obtained. Therefore it is considered that ionic bondings between colorants and silk fibers are formed. Mordants did not improve dye uptakes and affect color of dyed fabrics significantly. But mordanting adversely affected lightfastness of dyed fabrics. Regardless of mordanting colorfastness to perspiration especially in alkaline condition of dyed fabrics showed low rating compared with other colorfastness. It is concluded that mordanting is not necessary for silk dyeing with green tea colorants.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.21 no.5
• /
• pp.911-921
• /
• 1997

Recently the interest in natural dyeing has been increased because of the color clarity, natural grace and reactionism in fashion. Indigo dyeing, safflower dyeing and Gal-ott in Cheju-Do become generally known, so the study about the natural dyeing is continued with national intrust and support. In this study, 1 used artemisia for various dyeing tests because we can get it easily. 1 tested the dyeability in wool as well as cotton and silk with wormwood in natural dyeing material. I also dyed nylon with the same material for the comparison of the molecular structure. The mercerization and the chitosan treatment were done in cotton to improve the low dyeability in the natural dyeing. The result of this study are as follows; We have to dye repeatedly to get deep color in natural dyeing, and mordant treatment brought good result in color difference and dyeing fastness. 1. Compared with silk, wool and nylon, the dyeability of cotton was the worse. The color difference of cotton was 18.81 without mordants , and 24.05 with mordant. The dyeability of cotton was much increased by mordants such as potassiumdichromate, copper sulfate, iron sulfate and salt water. The color of cotton was turned into yellow-green in potassium dichromate and yellow-green with deep green in copper sulfate. The mercerization and the chitosan treatment of cotton made the improvement in color, dyeability, laundering fastness, abrasion fastness. 2. The color difference of silk was 3 times as high as cotton. It showed the similar degree with the chitosan treated-cotton. That is to say, silk had good dyeability because it contains amino group and carboxyl group. The dyebility of silk was increased by a mordant such as iron sulfate, potassium dichromate and salt water, Drycleaning fastness showed 5 grade, abrasion-fastness was high over 4~5 grade and sunlight fastness showed 1 grade in all case. 3. The color difference of wool was the best among four fabrics because of 18 kinds of amino acids. It is considered that the sulfate of wool has the polarity and help metal- mordants get the better dyeability such as potassium dichromate, iron sulfate, copper sulfate, and aluminum chloride. The color was reddish-green in potassium dichromate, yellow.greenin iron sulfate and copper sulfate, and yellow in the rest mordants. Drycleaning fastness of wool showed over 4~5 grade, abrasion fastness 5 grade. Sunlight-fastness 1 grade. 4. The dyeability of nylon was almost same because of the similar molecular structure with silk. The clarity of color was poor. The color was yellow-green in copper sulfate and yellow in the rest mordants. Laundering fastness and abrasion-fastness of nylon was good. Sunlight- fastness represented 1 grade.

• Science of Emotion and Sensibility
• /
• v.21 no.1
• /
• pp.143-154
• /
• 2018

This study was performed in order to suggest useful data for color planning of eco-friendly and sensible fashion products. Silk fabrics were dyed in combination with natural indigo and Japanese pagoda tree and were treated with four kinds of mordants after combination dyeing. Then, their colorimetric properties were evaluated. From these composite-dyed silk fabrics, color sensibilities and color preferences of green yellow (GY) color were evaluated among the female university students, and thus, the influences of colorimetric properties and color sensibilities on color preferences were analyzed. When the silk fabrics were dyed in the combination of natural indigo and Japanese pagoda tree and were treated without mordants, they turned green color when indigo 10 g/L was used, and blue-green when indigo 20 g/L was added. And when they were dyed in combination of natural indigo and Japanese pagoda tree and were treated with four kind of mordants after combination dyeing, they turned GY color in almost all cases. The color sensibilities of the GY silk fabrics with the combination dyeing of indigo and Japanese pagoda tree, were classified into three factors: pleasantness, gracefulness, and comfort. Color sensibility factors showed significant differences according to the concentration of indigo and the kinds of mordants. There were almost significant relationships between colorimetric properties and color sensibilities factors of compositely dyed GY silk fabrics. The color preferences of the GY fabrics, which were dyed in the combination of using natural indigo and Japanese pagoda tree and four kinds of mordants, were found to be predicted by the color sensibility in a regression model.

• Journal of Internet of Things and Convergence
• /
• v.7 no.4
• /
• pp.35-41
• /
• 2021

Natural dyeing has traditionally been used in many countries around the world, and as natural dyes are diversified, the diversity of dyeing patterns is also expanding. This study tried to establish standardization by providing numerical values that could provide quantified information to the Internet of Things by more accurately analyzing the color changes of dyes and mordants for the four natural dyes. The addition of copper acetate, iron II sulfate and potassium dichromate to the dye extracted from Juglans regia Linn changed the original color of brown to other colors of purple, khaki and dark brown, respectively. Except for potassium dichromate added to Sophora japonica L. or Phellodendron amurense Ruprecht, the concentration of other mordants was reduced, but the color difference of the dyed silk was very large. However, although there is a difference in degree, copper acetate and iron sulfate induced color changes of 35% and 15%, respectively. In summary, it was confirmed that the highest color change was induced when 15 grams of copper acetate was added to J. regia Linn, S. japonica L. and P. amurense Ruprecht and 150 grams of iron to Phytolacca americana. The results of this study suggested that the accurate color change by various mordants can be utilized as important information that enables more accurate color induction by dyes and mordants.

• Textile Coloration and Finishing
• /
• v.14 no.1
• /
• pp.34-42
• /
• 2002

In order to investigate the light fastness of Korean knotweed extract, the concentrate were prepared and dyed to silk fabric under the various conditions, such as kinds of mordants, methods of mordanting, and the dye concentration. After the deed fabrics were irradiated for several hours, the color differences and K/S values were measured. Additionally, the light fastness of Korean knotweed extracts and Emodin in liquid solution was compared. The light fastness of silk fabrics deed with Korean knotweed extract was improved by the Introduction of Fe-mordant, but the surface colors on the dyed fabrics shaded into reddish and dark yellow by 80hours irradiation. Color difference of fabrics were increased wish concentrations of Korean knotweed extracts. So inconsistent fading behaviour was observed. Color difference of dyed fabrics increased remarkably at the early stage of fading and became slowly down except for Fe-mordanted fabric. Absorbance of Korean knotweed extracts and Emodin in liquid solution were extremely decreased with concentrations of colorants, so inconsistent fading behaviour was observed too.

• Journal of Fashion Business
• /
• v.9 no.3
• /
• pp.99-113
• /
• 2005

Recently, problems related to the natural dyeing have been addressed. Severer problems have been posed by the elution at metallic ions and dyestuff tram dyed fabrics. In order to prevent the elution tram the dyed fabrics, it is needed to improve the fastness. Especially, it is the most important measure to improve the fastness to perspiration in terms at human body safety. In this study, we employed chitosan pretreatment method bet ore the dyeing process, anticipating that the pretreatment might improve the fastness. We used Al, Sn, and Cu as mordants and investigated the fastness to light and perspiration of the chitosan treated and dyed fabric specimens. By the chitosan pretreatment, the fastness to perspiration improved, while the fastness to light did not.