FIELD: chemical industry, more particularly manufacture of film and fibrous materials having thermal stability and resistance to rigid UV radiation. SUBSTANCE: molding solution contains (wt%): 8-10 triacetate; 0.007-0.032 1- (11-methylbenzimidazolyl-21)-3-methyl-5-(p- sulfamidophenyl) formazane or its nickel complex; and up 100 mixture of methylene chloride and ethanol in 9:1 volumetric ratio. EFFECT: improved properties. 1 tbl
