Rollei RXN Fix Neutral is a pH neutral rapid fixer for processing black and white films and photographic papers. RXN Fix Neutral is specially designed to make fiber-based papers suitable for archiving. The working solution is virtually odorless. RXN Fix Neutral is a non-hardening fixer. This universal fixer is suitable for tray, tank and machine processing (up to 26°C). Dilution 1 + 4, 1 + 7 and 1 + 9.