I'm trying to compare the test sensitivities of HT1 vs HT2. HT1 measures the residual hypo content of the last wash water using potassium permanganate, and HT2 measure the residual hypo content of the emulsion using silver nitrate. Has anyone used both and can share their experience? Regards Ralph W. Lambrecht http://www.darkroomagic.com ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.