Homepage › Forums › General Photography › Film Photography › How long should developer last ? This topic is empty. How long should developer last ? MarkKeymaster May 11, 2007 at 6:42 pm I have most of a bottle of Ilford Ilfosol left since xmas, should I just thrown it away ? Same with some Ilfostop. cheers Mark FintanParticipant May 11, 2007 at 7:08 pm Ilford Photo http://www.ilfordphoto.com wrote: ILFOSOL S 24 months in full tightly capped bottles. 4 months in half full tightly capped bottles. ILFOSTOP PRO concentrate will keep for:- 5 years in full airtight bottles 12 months in half full tightly capped bottles Hope that helps, the Ilfosol might be iffy but these best before dates are usually very shorter than they really are. Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.