• Journal of the Korean Society of Clothing and Textiles
• /
• v.37 no.1
• /
• pp.17-26
• /
• 2013

Market available fermented indigo powders of Indian origin (FI1, FI2), Chinese origin (FC1, FC2), and raw indigo powders of Indian origin (R1, R2) were examined using TLC and HPLC analyses to investigate their pigment contents. TLC analysis gave $R_f$ values of 0.81 and 0.72 for blue and red pigments, respectively. All the powder products and the synthetic and natural indigo standards eluted at 6.9 min and 8.3 min in the HPLC chromatograms, and the peaks showed the ${\lambda}_{max}$ at 610nm and 542nm, representing indigotin and indirubin, respectively. The pigment content calculated based on the area of indigotin and indirubin peaks in the HPLC chromatograms showed that the indigotin content was higher in FC1 and FC2, while FI1 and FI2 had a higher indirubin content. The relative percentage of indirubin was the highest in R2, but the HPLC peak intensity was quite low. Despite the higher indigotin content in FC1 and FC2, cotton dyed with FI1 and FI2 (versus cotton dyed with FC1 and FC2) showed a higher blue (B) hue, the highest K/S values, and the highest antimicrobial effect.

• Journal of the Korean Society of Costume
• /
• v.65 no.5
• /
• pp.51-61
• /
• 2015

This study examines the types and forms of underwear worn during the Joseon Dynasty period, and the purpose of this study is to apply the Joseon underwear design elements into designs of modern clothes, and make clothes that have practical use. In addition, it examines natural dyeing in the production of works, using a dye that contains tannin to increase color fastness. This study, first, looked into the types of female underwear during the late-Joseon Dynasty period through literature research and literature study. Second, the study chose artificial silk material (rayon), which was applied with dye containing tannin, and then with indigo (Jjok) and a different dye. Also, the study tested color fastness by washing the material, and rubbing fastness was tested if the material was either dyed with indigo. if it was dyed first with dye stuff containing tannin, and then with indigo dyeing color. Third, using the underwear types in the Joseon Dynasty period, the study developed and produced a dress, a skirt and pants that could be worn in modern life on a daily basis by applying Mujigi-chima (underwearskirt), Dan-sokgot (slip), Salchang-gojaengi (loosedrawers) and Sok-baji (bloomers) forms. Dresses applying underwear skirt using naturally-dyed artificial silk, dresses applying Salchang-gojaengi, dresses applying Dan-sokgot, skirt without a crotch designed in the form of pant swith an open crotch, and pant skirt with a crotch-applying pants with an open crotch were produced. In the future, hopefully, various studies of collaborations of Korean traditional clothing, and natural dyeing will continue to kee) the tradition alive.

• Conservation Science in Museum
• /
• v.14
• /
• pp.81-89
• /
• 2013

This study concerns UV-Vis spectrophotometry and 3D-fluorescence spectrophotometry analysis of textile parts of blue and green tones dyed with indigo of blue tone and turmeric, gardenia, goldthread and amur cork tree of yellow tone. In order to verify whether the kinds of textiles affected analysis result of each dye, silk and cotton textile samples were produced. According to the analysis of the degree of reflection of UV-Vis spectrophotometry, unique reflection spectrum of indigo appeared regardless of the kinds of textiles when they were dyed with indigo. As for textiles of green tone, the 3D-fluorescence spectroscopic analysis result showed that unique spectrums of yellow dyes, turmeric, goldthread and amur cork tree appeared regardless of the kinds of textiles but the fluorescence spectrums of gardenia and indigo did not appear.

• Conservation Science in Museum
• /
• v.28
• /
• pp.109-136
• /
• 2022

This study analyzes the , one of the three panels of 《Welcoming Banquets for the Governor of Pyeong-an》, a documentary painting of the late Joseon Dynasty, with the aim to identify the coloring materials used in the painting. The painting was first imaged at each wavelength in order to minimize the potential problems in the process of analyzing specific parts. This study applied X-rays to identify ink, gold, and organic and inorganic pigments and used infrared rays to find ink and copper-based pigments. It also applied hyperspectral imaging to distinguish organic pigments from black, blue, and green materials. It also analyzed spots selected for each color to identify the following materials: white lead (white), ink/indigo (black), a combination of red lead and cinnabar (red), pink dye, purple dye, iron oxides (brown), orpiment/dye (yellow), malachite/malachite and yellow dye/indigo (green), azurite/white lead and indigo/indigo (blue), indigo and cochineal (violet), and gold leaf (gold). It is expected that more efficient analysis will be made possible by securing a sufficient library for each wavelength.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
• /
• v.21 no.3
• /
• pp.104-110
• /
• 2008

Objectives : This experiment study was performed to investigate the anti-inflammation and anti-oxidant effects of Indigo Naturalis(IN) and Rehmanniae Radix(RR) which were herbs for clearing heat. Methods : Anti-inflammation and anti-oxidation effects of IN and RR that were measured by the inhibitory ability of Nitric oxide(NO) production and the scavenging for 1,1-diphenyl-2-picrylhydrazyl(DPPH) radical. Results : 1. IN and RR groups were not showed cell toxicity. 2. In the inhibitory ability of NO production, IN groups were better than RR groups, but there were no statistical significances among the groups. 3. In the scavenging for DPPH radical, IN groups were better than RR groups, but there were no statistical significances among the groups. Conclusions : These results showed that the IN group was better than the RR group in treating skin eruptions, especially those such as erythema, purple spot, papule, pustules which appear in acute inflammation.

• Journal of the Korean Wood Science and Technology
• /
• v.2 no.3
• /
• pp.39-41
• /
• 1974

Bastard indigo, prevailing shrub species planted in erosion control work to constitute vegetation, is proved to be usefull for pulp material other than existing usage of green manure or fuel. Pulp made from bastard indigo is good enough for filler pulp though the quality of it is not remarkably excellent. (1) Sorts of paper possible to make from this pulp. Packing paper of medium grade. (general packing paper except heavy packing) (2) Traits of this pulp as for pulp material (A) It is more preferable than annual plants in these respects, ego collection, transport and storage of pulp material, and yield, freeness and chemical consumption of pulp. (B) Annual probable production of pulp material per ha from this plant is higher than that from long-term tree species or similar to that from fast growing species. (C) Its cultivation on eroded area is welcomed and consecutive annual production of material by copice method is also proved possible.

• Textile Coloration and Finishing
• /
• v.11 no.4
• /
• pp.24-30
• /
• 1999

Cotton fabric was dyed with indigo at different pHs, dye concentrations, and repeated dyeings. And the K/S value and dye uptake of the dyed materials at those conditions were determined. The decrease of pH during the reduction process of indigo stock solution was observed. As a result the decrease of pH of the dye stock solution depended on the dye concentration and initial pH. The highest K/S value was shown at fabric dyed at pH 11 and the relationship between K/S value and dye uptake depended on initial pH of reduction bath and the slope was lower as the pH increased to 13.

• Bulletin of the Korean Chemical Society
• /
• v.24 no.10
• /
• pp.1444-1448
• /
• 2003

The microsurface adsorption - spectral correction (MSASC) technique has been applied to the interaction of indigo carmine (IC) with cetyltrimethylammonium bromide (CTAB). The aggregation of IC on CTAB obeys Langmuir isothermal adsorption. The results show that both the monomer complex $IC{\cdot}CTAB$ and the micellar complex $(IC{\cdot}CTAB)_{78}$ were formed. The binding constant of the monomer complex was calculated to be $K_{IC{\cdot}CTAB}$ = 2.20 ${\times}10^5L{\cdot}mol^{-1}$, and the molar absorptivity of the micellar complex was calculated to be ${\varepsilon}_{(IC{\cdot}CTAB)78}\;^{560nm}$ = 8.58 ${\times}10^5L{\cdot}mol^{-1}{\cdot}cm^{-1}$. The aggregation was applied to the determination of cationic surfactant in wastewater.

• Journal of Sericultural and Entomological Science
• /
• v.49 no.1
• /
• pp.8-13
• /
• 2007

Natural indigo colorants were prepared by extraction of Polygonum tinctorium which was harvested just in the blooming season(in the late of July). The components were analyzed by TLC and HPLC, and its structures were analyzed by FT-IR, EI-mass. The results obtained are summarized as follows; The natural indigo powder was dissolved in DMSO and developed in eluent, $CHCI_3/CH_3CN$(8.5:1.5 v/v) by means of TLC for its quality analysis. It was segregated into indirubin as a red colour and indigo as a blue colour. In case of HPLC analysis,. FT-IR spectrum of indirubin showed a peak for NH residue between 3200 and $3300cm^{-1}$. $^1H-NMR$ spectrum for indigo displayed AA'BB' spin system caused by indole structure between 6.5 and 7.7ppm of H4, 5, 6 and 7, and -NH proton for indirubin showed an singlet between 10.88 and 11.0ppm. EI-mass spectrum of indigo and indirubin both disclosed their molecular size as 262 and it implies that these two substances are isomer.

• Journal of Fashion Business
• /
• v.10 no.1
• /
• pp.120-131
• /
• 2006

Recently, it has been reported that chemical hair coloring can cause allergic reactions, the toxicity issue of chemical hair color was issued. Therefore, there is an increasing interest in the hair coloration technique using non-toxic and bio-compatible hair color gotten from natural resource. In this study, the possibility using fermented Indigo as natural hair coloring agent was investigated. Bleached hair samples were dyed using Indigo, and the effect of dyeing frequency, the physical change after dyeing, color, surface and cross-section characteristics, and tensile property were also studied. In addition, the protection property of cationic detergent finishing on damaged hair samples were also studied. The following conclusions are made; 1. While bleached hair samples with low value showed the negligible effect of repeated dyeing, bleached hair samples with high value showed the good effect of repeated dyeing. 2. Hair sample dyed with Indigo showed a high light-fastness, however, tensile strength and elongation showed very low values (high damage on hair sample). 3. Cationic detergent finishing did not affect on the colorfastness because of decoloration after dyeing, however, it increased the smoothness of hair sample, and therefore, can use as protectant of damaged hair. 4. Hair scale was damaged after dyeing. It seemed that the alkali, potassium carbonate, increased pH of dyeing bath to 11, as a result, the hair was swollen, weaken, and dissolved on the prolonged dyeing time. Dyed hair sample became stiff and fine. 5. The color difference was 4.62 (a high fastness value) in the test of sunlight exposure, shampoo, cationic detergent finishing, and acid perspiration fastness.