FIELD: wood-pulp and paper industry. SUBSTANCE: according to method, bleached high-consistency lignocellulose mass is produced by bleaching of lignocellulose mass from first degree of whiteness GE to second higher degree of whiteness GE. Executed are stages of loosening of high-consistency mass with first degree of whiteness GE for obtaining specific surface area of at least about 90 sq.m/kg without substantial changing of mass grinding rate. Contact of loosened mass with gaseous bleaching agent results in creation of bleached mass possessing second higher degree of whiteness GE. Application of aforesaid method allows for obtaining higher degree of whiteness of lignocellulose mass. EFFECT: higher efficiency. 30 cl, 3 tbl, 5 dwg
