ILFORD SIMPLICITY Film Developer is a liquid concentrate black & white film developer in an easy to use sachet.Each sachet contains the correct amount of photo chemicals to develop 2 rolls of 35mm (135) film or 1 roll of 120 film when using a 2-reel, 600ml developing tank at a dilution of 1+9.The sachet contains the popular ILFORD ILFOSOL 3. This film developer is formulated to exploit the full potential of conventional black & white film emulsions, delivers fine grain and optimal sharpness and is well suited to beginners and advanced users alike.ILFORD SIMPLICITY Film Developer is available as single sachets, multi packs of 5 sachets or as part of a Starter Pack containing 1 x film developer, 1 x stop bath, 1 x fixer, 1 x wetting agent.