ILFORD HYPAM is a non-hardening rapid fixer supplied as a liquid concentrate that is diluted with water for use. It 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 18 - 40ºC (66 - 104ºF). It can also be used for fixing other specialist, X-ray, scientific products and graphic arts materials. The fixing agent in HYPAM is ammonium thiosulphate, it contains no sodium thiosulphate (hypo).