Process for aftertreating dyed fibrous material made of or conta

Bleaching and dyeing; fluid treatment and chemical modification – Bleaching – Chemical

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8543, 8584, 8650, 8918, 8549, 252180, 25218625, 25218628, D06L 302, D06P 340, D06P 502

Patent

active

045155968

ABSTRACT:
Dyed fibrous materials made of or containing cellulose which were not bleached before dyeing are aftertreated in a combined bleaching and washing bath which can, optionally, contain as stabilizers derivatives of phosphonic or phosphorous acid, optionally as a combination with polyhydroxy compounds. The resulting materials have bright and brilliant shades.
This aftertreatment makes it possible to by-pass the otherwise customary, time-consuming and expensive drying of the materials between a bleach before dyeing and the dyeing itself.

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