The handicraft applies iron and steel blackout and improves
Abstract:
In the article talks about the application high temperature nigrescence craft skill from ameliorate technics and processing method and so on. The emphasis is on normal temperature nigrescent of A salt of selenic acid system and so on.At the same time point out that,in order to raise the normal temperature nigrescence technics to a new level even completely replaced high temperature nigrescence,more research is still required.