FIELD: textile industry. SUBSTANCE: cellulose-containing material is impregnated by aqueous solution which contains precondensate of amino-aldehyde resin, ammonium or magnesium chloride and sodium dithionite. Quantities of said reagents are 50-200, 2.5-20.0 and 1-4 g/l respectively. After drying and heat treatment textile material is washed by steps. Final washing is carried out in the presence of sodium dithionite, sodium sulfite and soda ash, their quantities are 2-8 12-35 and 3-8 g/l respectively. Content of free formaldehyde in 1 g of cotton and viscose fabric is 0 and 22 micrograms respectively. EFFECT: improves efficiency of the method. 3 tbl
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