This paper report a study on the application of fluorescent whitening agents used for making photographic materials,especially focusing on the use of domestic and overseas fluorescent whitening agents in the preparation of protective layer of photographic paper.

This paper outlines main technical s pecifications and photographic characteristics of Era brand typeⅡblack -and -white photographic papers,their testing results and consumers' appreciation,together with their processing conditions.

In the light of long years production experience of photographic paper,this article presents a concise summary of main technical problems concerning the preparation of barium sulfate paste.