According to 'Post Development Processing' by Dr. Michael J. Gudzinowicz the following are the recommended levels for commercial and archival processing: Commercial Archival Bath 1: Max. Ag conc.: 2 g/l 0.8 g/l Bath 2: Max. Ag conc.: 0.3 g/l 0.05 g/l Non-image Ag in paper: 0.005 mg/in^2 0 In his paper Gudzinowicz makes reference to other research done by Grant Haist, the former director of research at Kodak, who cites the following maximal permissible values for one-bath paper fixers: Commercial Archival Paper: Max. Ag conc.: 0.3 g/l 0.05 g/l Non-image Ag in paper: 0.005 mg/in^2 0 Regards Ralph W. Lambrecht On 12/31/04 10:44 PM, "Ryuji Suzuki" <rs@xxxxxxxxxxxxxxx> wrote: > From: DarkroomMagic <info@xxxxxxxxxxxxxxxx> > Subject: [pure-silver] Re: Acid Stop and FB was " RC to FB" > Date: Fri, 31 Dec 2004 21:05:38 +0100 > >> Sounds reasonable, but I don't do it, because I change the 1st fixing bath >> as soon as silver levels have reached 0.8 g/l anyway. > > Why? That's about half square meter of print per liter, right? > > If you are doing two stage fixation, you should be able to use a lot > more than that. > > -- > Ryuji Suzuki > "Keep a good head and always carry a light camera." > ============================================================================== > =============================== > 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. ============================================================================================================= 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.