Kodak Professional Rapid Fixer consists of two liquid concentrates: Solution A (the fixer concentrate) and Solution B (the hardener concentrate). For machine, tray, or tank processing. For use with film and paper. Dilute 1+4 for film, 1+7 for paper. Complete fixer to make 1-2 gallons each (32 oz bottle A fixer + 3.6 oz bottle B hardener).