PRETREATMENT METHOD FOR REDUCTION OF LIGHT-INDUCED YELLOWING OF LIGNIN-CONTAINING MATERIAL

摘要

The present invention provides a method for treating lignin-containing fibrous material to reduce its susceptibility to yellowing, comprising pretreating the material with a reducing agent and stabilizing the lignin of the material with an oxidizing agent capable of oxidizing phenolic or similar groups, which may undergo reactions conductive to the formation of colored sites on the fibers. The present invention also provides a lignin-containing material obtained by said method.