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Wool bleaching with thiourea dioxide
Author(s) -
Cegarra J,
Gacén J,
Caro M,
Pepió M
Publication year - 1988
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1988.tb01168.x
Subject(s) - thiourea , wool , chemistry , decomposition , inorganic chemistry , materials science , organic chemistry , composite material
This paper examines the results of using thiourea dioxide as a reducing agent in wool bleaching. The first part analyses the influence of p H , temperature and concentration of thiourea dioxide in solution on its decomposition, which increases markedly at p H values above 5.5, at temperatures over 50°C and when the concentration decreases. The second part studies the influence of temperature, concentration of thiourea dioxide and time on the degree of whiteness, yellowness index, cysteine content and tensile strength of the bleached wool. A central rotatable design is used to find the response equations of the properties of bleached wool versus the variables. Finally, the optimum conditions of wool bleaching with thiourea dioxide are indicated.