Ilford Rapid Fixer is a non-hardening rapid concentrate fixer. It is easy and convenient to use for fixing black and white film and paper in all manual and machine processing applications.
Ilford Rapid Fixer is based on ammonium thiosulfate, and contains no sodium thiosulfate(hypo).
This 500 ml bottle can make between 2.5 and 5 liters of working solution.
The Brownie Camera Guy says:
Ilford makes the highest quality analog photographic products available!