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Dyes from the leaves of deciduous plants with a high tannin content for wool
Author(s) -
Raja A S M,
Thilagavathi G
Publication year - 2008
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.1478-4408.2008.00153.x
Subject(s) - mordant , tannin , wool , chemistry , chloride , ferrous , deciduous , orange (colour) , dyeing , ferrous sulphate , nuclear chemistry , botany , food science , organic chemistry , inorganic chemistry , materials science , biology , composite material
The aqueous leaf extracts of five different deciduous plants, namely, silver oak, flame of the forest, tanner’s senna, wattle and serviceberry, were used on their own and in combination with aluminium sulphate, stannous chloride and ferrous sulphate to dye wool by a simultaneous mordanting technique. The washing and light fastness properties of the developed shades were moderate to good. Based on the CIE 2000 spectral colour coordinate values ( K/S , Δ L , Δ a , Δ b and Δ E ), the developed shades were classified into four groups: yellow/brown, yellow, orange and dark grey. The use of aluminium sulphate gave medium shades ( K/S = 8.24), while the stannous chloride and ferrous sulphate mordants provided deep shades ( K/S = 30.5). Statistical analyses have shown that only the type of mordant and not the dye source significantly influenced the development of colour on wool. Hence, it was theoretically possible to use five selected leaves as a single mixture to produce four different colours on wool.