> > > Fresh, relatively high sulfite fixer and the use of a hypo clear will reduce > > fog some too. > > What's your definition of fog? > For photographic purposes, my definition of fog is a bit broader than just the conversion of non-light exposed silver halide to metallic silver. I also include any general (not image specific) density in a negative. This definition also includes dye remnants and stains. I once scrubbed the emulsion off of several 35mm films in order to measure the base density so I could determine the true emulsion fog density by difference. I was amazed at the presence of gray and lightly colored density I found in the plastic of the base. Tri-X had a gray base density of about 0.20 and a total fb+f of about 0.30 giving an emulsion fog level of 0.10. I have found that my fixer, even though it still fixes fine, will contribute to fog if it gets too much age on it. This seems to be related to sulfite exhaustion because it is reversible by adding more sulfite. These older fixers also plate metallic silver on the inside of my storage bottle so I suspect a high silver content may contribute to the fog. JB ============================================================================================================= 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.