COMMERCIAL FORM OF OPTICAL BLEACHING AGENT Russian patent published in 2003 - IPC

FIELD: paper-and-pulp industry. SUBSTANCE: commercial form of optical bleaching agent used for bleaching cellulose textile materials and paper contains, wt %: triazinylaminostilbene series bleacher 100, blue-spectrum direct dye 0.05-0.15, green-spectrum direct dye 0.001- 0.05, and red-spectrum direct dye 0.01-0.0001. Bleaching capacity of proposed bleaching agent is 2.2-fold superior to that of known bleaching agent containing mixture of blue direct dye and blue acid dye. Undesired reddish nuance of white color is changed into pale blue or neutral nuance. EFFECT: improved optical characteristics. 6 cl, 1 tbl, 14 ex