Ilford rapid fixer 500ml 1984253 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 in the temperature range of 18c 66f for fixing black and white film and paper in all manual and machine processing applications ilford rapid fixer must not be used with fix hardeners the fixing agent in ilford rapid fixer is ammonium thiosulphate and contains no sodium thiosulphate hypo