U of S | Mailing List Archive | alt-photo-process-l | Dichromate concentration question

Dichromate concentration question

  • To: alt-photo-process-l@usask.ca
  • Subject: Dichromate concentration question
  • From: Keith Gerling <keith.gerling@gmail.com>
  • Date: Thu, 15 Jan 2009 06:53:24 -0600
  • Comments: "alt-photo-process mailing list"
  • Delivered-to: alt-photo-process-l-archive@www.usask.ca
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As I sit typing the temperature outside is -23F.  My studio is a tad
warmer, but I have noticed a dramatic change in what I need for
printing times for gum.  We all know that "saturated" solutions change
with temperature, and the cautious printer will weigh out the
chemicals.  But is there a multiplier I can apply to my printing
speeds that will take into account the actual amount of ingredients
contained in my "saturated" solution of Potassium Dichromate at
different temperatures?