Term - Restrainer
|Restrainer||SWPP and BPPA Photographic Glossary|
Monday 22nd December 2014
The chemical constituent of developing solutions which helps prevent reducing agents from affecting unexposed halides and converting them to black metallic silver.
Information provided by: SWPP BPPA
SWPP & BPPA, 6 Bath St, Rhyl, LL18 3EB