Ilford Rapid Fixer for black and white films and papers. The concentrate contains ammonium thiosulfate as a fixing agent. It contains no sodium thiosulfate (hypo). Rapid Fixer is used for manual or machine processing. Cannot be used in conjunction with a hardening agent. Dilution: 1 + 4 und 1 + 9 (paper processing). Yield: 1 + 4: 24 (35 mm) films (135-36), 4 m² RC paper or 2 m² FB paper per liter of working solution; 1 + 9: 4 m² RC paper or 2 m² FB paper per liter of working solution.