Anyone knows if is corect to get purple neg base when Ilford DELTA 400 Pro is fixed for 12 min using Normal Fixer? I cut a piece of a leader and fixed it for 12 min and the purple apearance still there. Doesn't change. It is normal? Using graded papers like Ilford MG IV should I get more constrasting pictures? Any ideas? Regards Mauricio(posted 9815 days ago)