Abstract

Production of mechanical pulps (MP) have been increased for useful utilization of woods and global environmental problems. However, light-induced color reversion of mechanical pulps is the biggest problem on use of it. But, the problem of the color reversion has not solved yet though many researches on prevention of the color reversion have been conducted.This paper describes about the chemical and biological prevention of light-induced color reversion of mechanical pulps. And furthermore, a mechanism of the color reversion, change of lignins caused by pulping process and effect of the changes on the color reversion, and effect of bleaching of MP on the color reversion are also described.

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