METHOD OF JOINT COTTONIZING AND DYEING OF FLAX FIBER Russian patent published in 2002 - IPC

FIELD: textile industry. SUBSTANCE: in a method comprising treatment of flax fiber with solution including alkali, dye, and reducing agent, after which dye is oxidized, fiber is subjected to acidification and washing to remove acid, is distinguished by that starting flax fiber is brown material preliminarily subjected to mechanical garneting to attain linear density 0.3-1.5 tex, treatment solution is completed by complexone based on ethylenediaminetetraacetic acid sodium salt or ethylenediphosphonic acid derivative, dye is of vat dye type, reducing agent is represented by hydrosulfite, rongalite, and nitrogen-containing reducer taken individually or in various combinations with each other, and oxidation of dye and acidification are conducted simultaneously by consecutively performing washing with cold water and treatment with acidic hydrogen peroxide solution. EFFECT: increased workability of cottonine in a variety of operations and improved coloration quality. 2 cl, 4 tbl, 11 ex