Bleaching and dyeing; fluid treatment and chemical modification – Organic additive for dye composition – dye composition... – Polymeric additive
Reexamination Certificate
2006-02-14
2006-02-14
Einsmann, Margaret (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Organic additive for dye composition, dye composition...
Polymeric additive
C008S557000, C008S558000, C008S637100, C008S653000, C008S661000, C008S930000
Reexamination Certificate
active
06997962
ABSTRACT:
A method for dyeing a cellulosic material, such as cotton or a blend including cotton, in the form of yarn, fabric, or garments, includes: a) preparing a dyebath including particles of indigo and an additive, such as an anionic acrylic copolymer, causing the particles to become charged; b) preparing the cellulosic material by applying an additive, such as a cationic polyamide, forming a substrate with a charge attracting the particles, c) immersing the cellulosic material in the dyebath; d) chemically reducing the particles retained on the cellulosic material to a leuco form; and e) oxidizing the dye material.
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Davidge Ronald V.
Einsmann Margaret
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