Colorimetric properties of wool dyed with natural dyes after treatment with ammonia
- 1 July 2004
- journal article
- Published by Wiley in Coloration Technology
- Vol. 120 (4) , 161-166
Abstract
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.Keywords
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