Rinse/Wash Aid, Fotospeed RA 50 for Photographic Film, aids in even streak-free drying[BDWC]
Fotospeed RA50 is a highly concentrated liquid designed to greatly reduce surface tension to allow the easy
dispersion of water from the surface of photographic materials without damaging the emulsion. Used in the
final rinse, it noticeably promotes streak free drying of film and shortens drying times.
RA50 should be added to the final rinse in the ratio of 1 part
RA50 to 200 parts water. i.e. 5mls /Ltr of water