Ilford Hypam Fixer is a non-hardening rapid fixer supplied as a liquid concentrate that is diluted with water for use. Hypam is easy and convenient to use. Without the addition of a hardener it is suitable for all black and white film and paper, manual and machine processing applications in the temperature range of 18C
The fixing agent in HYPAM is ammonium thiosulphate, it contains no sodium thiosulphate (hypo). At a 1 4 dilution, RC papers should be fixed for 1-2 minutes. Fiber based prints should be fixed for 1-2 minutes.