FIELD: chemical industry. SUBSTANCE: solution for forming has, %: cellulose triacetate 8-10; 1-(2'-quinoxalyl)-3-methyl-5-(4'-carboxyphenyl)-formazan, 1-(2'-quinoxalyl)-3-methyl-5-(4'-hydroxyphenyl)-formazan or 1-(2'-quinoxalyl)-5-(4'-dimethylaminophenyl)-formazan 0.024-0.066, and mixture of methylene chloride with ethanol at volume ratio = 9:1 up to 100. Mixture is used for production of fibrous and film materials. EFFECT: enhanced quality of solution. 1 tbl
