Method for reducing thermal and light-induced brightness reversi

Details Method for reducing thermal and light-induced brightness reversi Method for reducing thermal and light-induced brightness reversi

1994-07-28

1995-08-22

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106506, 10628723, 10628724, 10628726, C09C 102

Patent

active

054436346

ABSTRACT:
A method and article of manufacture thereof is provided for reducing brightness reversion in bleached lignin-containing pulps or newsprint by the treatment of the bleached lignin-containing pulp or newsprint with 2,5-dihydroxydioxane. In one embodiment, calcium carbonate is added to enhance the activity of 2,5-dihydroxydioxane.

REFERENCES:
patent: 5360515 (1994-11-01), Francis et al.
patent: 5376495 (1994-12-01), Washizu et al.

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