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.

Development time in tanks (68°F/20°C) for Ilford FP4 Plus (EI 200) film:
Diluted 1+9 = 5 min. Diluted 1+14 = 7.5 min.

For Ilford PAN F Plus (EI 50) film:
Diluted 1+9 = 4 min. Diluted 1+14 = 6 min.

Storage time for unopened full bottle of Ilfosol-S concentrate is 18 months . For half full bottles of concentrate storage time is 3 months. Once it is diluted it can only be used as a "one-shot" developer and should not be stored.