ILFORD ILFOSOL - S is a general purpose, black and white film developer based on several modern developing agents. It is particularly suited to developing medium and slow speed films, such as FP4 Plus and PAN F Plus. ILFOSOL - S gives fine grain and excellent sharpness with full film speed. It is supplied as a liquid concentrate in 16 ounce (473ml) containers for easy and economical one - shot processing. The recommended dilution is 1+9. For greater economy, and to enable practical development times to be used when processing at higher temperatures, ILFOSOL - S can be used at 1+14.