The research progress and applications of environmental-friendly auxiliary sizing agents were reviewed,except for modified starch,acrylate and PVA,which are the three major types sizing agents in use at present.

Analysis of available energy and critical water content of sludge where auxiliary fuel is added;

Working temperature of valve accessory material;

Strengthening auxiliary materials management, and improving service quality;

In view of the many problems existing in the research on auxiliary materials for news among the news - writing circles, this article makes an investigation of the points at issue, wb emphasis on an analysis of the nature, types and functions, etc.