FIELD: textile, paper.
SUBSTANCE: method to prepare bleached paper material includes production of a bleached paper material and putting the latter in contact with efficient quantity of one or more oxidants, excluding organic peroxyacids. The method to produce a paper item includes production of a bleached paper mass. Water suspension from this mass is created. The suspension is dehydrated to make a sheet and drying. At the same time efficient quantity of one or more oxidants are added into the bleached paper mass or its suspension, excluding organic peroxyacids. Or an efficient quantity of one or more oxidants are added onto a sheet, including organic peroxyacids. The method to produce a paper item (a version) includes production of a bleached paper mass and creation of a thick suspension from it. Then the efficient quantity of one or more oxidants are added into the thick suspension, as well as one or more optical bleaches. Afterwards the thick suspension is dissolved, dehydrated to produce a sheet and dried. When using oxidants in a combination with optical bleaches and/or chelating agents, a synergetic effect is observed.
EFFECT: increased and stabilised brightness of a paper mass or paper and increased stability to their yellowing.
24 cl, 9 tbl
