Ilford Rapid Fixer 5L is a non-hardening rapid fixer. Ideal for both film and paper, this is a liquid concentrate that is diluted with water for use(dilution 1+4 or 1+9). Will work well in the temperature range of 18-40ºC (66-104ºF) to fix black and white film and paper in all manual and machine processing applications.It must not be used with fix hardeners.