Fading characteristics of a disperse dye on cellulose triacetate, polyester and nylon under monochromatic light radiation

Abstract

Light fastness of CI Disperse Blue 165 dye on cellulose triacetate, polyester and nylon fabric substrates exposed to monochromatic light was examined on a radiant energy basis. The action spectra indicated a strong effect on the substrate‐fading characteristics: nylon exhibited poorer light fastness in the visible and ultraviolet light range than polyester and cellulose triacetate. Two specific fading peaks were found for the nylon substrate, which were different to those found for the polyester and cellulose substrates. It was shown that polyester exhibited the best light fastness properties overall. The colour changes in the fading process suggested that the fading products of the dye on nylon (where reduction occurred) were different from those on the polyester and cellulose triacetate substrates (where oxidation occurred).

Photofading of phenylazo‐aniline, ‐pyridone and ‐quinolone disperse dyes on a nylon 6 substrate

“…The effects of wavelength on the photofading of disperse dyes on PET and PA were researched by Katsuda et al [25][26][27][28] and Imaizumi and Yoshizumi [29]. They reported results different from the present study.…”

“…The effects of the wavelengths of the light source on the photofading of disperse dyes on PET and PA were examined by Katsuda et al. [25–28] and, more recently, by Imaizumi and Yoshizumi [29], but no clear results were reported. When the nitro groups play a role in the fading process, the photo‐excitation of the groups may be performed in the near ultraviolet (UV) region, although, as mentioned above, this has not been found to be the case.…”

Degradation of Japanese Lacquer under Wavelength Sensitivity of Light Radiation

“…Light exposures were conducted at temperature and relative humidity ranging from 20˚C to 25˚C and from 50% to 70%, respectively. These systems were also used in previous experiments published elsewhere [33][34][35].…”