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Decrease method of color returning the machine pulp and high yield chemical pulp
Decrease method of color returning the machine pulp and high yield chemical pulp
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机译:降低返浆机械浆和高产化学浆的颜色的方法
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摘要
The present invention concerns a process for reducing the susceptibility of lignocellulosic material to unwanted yellowing, particularly yellowing caused by light and heat. According to the invention, the fibres are activated enzymatically or chemically and then contacted with a modifying agent capable of bonding to the oxidized fibre material, rendering the lignocellulosic fibre material improved resistance to brightness reversion. By means of the invention, brightness reversion caused by light or heat or a combination thereof can be retarded and even stopped.
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