N-1 N N+1 EI/time EI/time EI/time HP5 Plus, 35 mm, XTOL 1+1 320/07:00 400/08:30 500/11:00 HP5 Plus, 120 film, XTOL 1+1 400/08:30 800/11:30(posted 8387 days ago)Condensor enlarger, presoak 2 min, agitation 30s + 3 turns/30s. I don't know the cause of the big difference between 35 mm and 120 film (it is much smaller w/ Delta 100).