1 Swelling mechanism of silks treated with peracid is described briefly.

2 This paper summarizes the effect of different transition metal ions on peracid bleaching and their respective mechanism, and introduces some methods of controlling transition metal ions.

3 Conclusions This synthetic method is safer and easily operated due to the avoidance of direct use of hazardous peracid in the rearrangement.

4 This synthetic method is safer and easily operated due to the avoidance of direct use of hazardous peracid in the rearrangement.

5 In this paper, the protection measures of carbohydrate during pulp TCF bleaching, such as oxygen, ozone, peroxide, peracid and photochemistry reaction of bleaching, were summarized respectively.