FIELD: textiles, paper.
SUBSTANCE: method comprises acid treatment, reducing boiling and oxidation treatment with the solution of hydrogen peroxide at a temperature from 95 to 100°C, avivage and washing between the technological operations first with hot and then cold water. The acid treatment is carried out with the preparation which is a composition comprising sulfamic acid with a concentration of 0.5 to 2.0 g/l. The boiling is carried out for 40 to 90 minutes using as a reducing agent the composition containing derivatives based on sulfinic acid with a concentration of 0.5 to 2.5 g/l and the reducing agent with the complexing additives with a concentration of 1.5 to 2.5 g/l.
EFFECT: improving the whiteness level of flax roving.
3 cl, 1 tbl
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