U of S | Mailing List Archive | alt-photo-process-l | Gumoil


I know that Karl Koenig uses a 3:1 gum/pot dichromate ratio for printing the positive, but I was wondering if anything would be amiss should I use my usual 1:1 (sans pigment, of course) since my gum negs are tuned to that already and I have a known exposure factor...
3:1 would make for a more contrasty gum deposit, I would guess but I'd have to expose longer than my 1:1 mix, right?
Someone, maybe Katherine (?) had a rule of thumb for exposure times with differing ratios/amounts of dichromate...?

  • Follow-Ups:
    • Re: Gumoil
      • From: Jim Larimer <jrlarimer@gmail.com>