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Colorimetric properties of wool dyed with natural dyes after treatment with ammonia
Author(s) -
Montazer Majid,
Parvinzadeh Maziar,
Kiumarsi Amir
Publication year - 2004
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2004.tb00223.x
Subject(s) - wool , ammonia , chemistry , tannin , lightness , anthraquinone , acid dye , colorimetry , natural dye , chromaticity , dyeing , organic chemistry , chromatography , materials science , food science , computer science , composite material , artificial intelligence , computer vision
An evaluation has been carried out of the effect of ammonia on the colouristic properties of wool dyed with a range of natural dyes containing anthraquinone, naphthaquinone, flavone and tannin structures. It was found in all cases that after‐treatment with ammonia caused a decrease in the lightness ( L *) values. The reasons for this are discussed, as is the fact that the colour change is not reversible on subsequent treatment with acid.