FORMULARY RAPID FIXER WITH HARDENER is a hardening, ammonium thiosulfate fixer that is fast and has high capacity. The hardener is mixed separately and is recommended for films but can be omitted for paper. Fixing time for film is 2 to 4 minutes and 3 to 5 minutes for prints in two successive baths. The chemicals in this kit are used to make 1 liter of concentrate, which is diluted 1:2 for film and 1:4 for prints. A 1 liter kit yields 3 liters of fix for film and 5 liters of fix for prints. Stock solution lasts 2 months. One liter fixes 30 rolls of film or 25 8x10 prints.