I switched to Ilford Plus (LC29) which seems (i.e. does) to last a lot longer the Ilfosol. It's also a liquid. I got caught out with some Ilfosol once, luckily it was nothing important! I haven't done any back-to-back comparisions between the two, however I have with LC29 and DD-X and with an 8X loupe on 8x10 enlargements from FP4+ I could pick a difference, but not viewed 'normally'. I still use DD-X for Delta films, one day I'll try a test for those in LC29! I have used LC29 for HP5+ but have no grounds of comparision, other than to say it works :)(posted 8467 days ago)