Details

Autor(en) / Beteiligte

• Okada, Yasuyo
• Satoh, Eiji
• Motomura, Hiromi
• Morita, Zenzo

Titel

Photofading of monochlorotriazinyl reactive dyes on cellulose under wet conditions

Ist Teil von

• Dyes and pigments, 1992, Vol.19 (1), p.1-19

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

1992

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• The fading of seven monochlorotriazinyl (MCT) reactive azo dyes (three monoazo and four disazo) on cellulose was investigated under wet conditions. It was shown by spectral analysis that these dyes on cellulose were faded via photoreduction on exposure in de-aerated water in spite of the absence of substrate. Oxygen suppressed the reductive fading for some of the dyes or inhibited it, resulting in oxidative fading. Thus four dyes were photoreduced on exposure in aerated water at a rate lower than that in de-aerated water, whilst the other dyes were photo-oxidized at a higher rate. The chemical structure of the dyes and the environmental conditions during exposure determine whether oxidative or reductive fading of MCT dyes on cellulose occurs under wet conditions.