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which dichromate


  • To: alt-photo-process-l@usask.ca
  • Subject: which dichromate
  • From: Keith Gerling <keith.gerling@gmail.com>
  • Date: Fri, 09 Oct 2009 15:13:58 -0500
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Does anyone know a simple method of determining whether a substance is Potassium vs. Ammonium dichromate?  I just started using a fresh batch of what is supposed to be Pottasium dichromate and now I'm getting very bad results: staining and what looks to be overexposure.  Whatever it is, I am using a saturated solution.  Isn't Ammonium dichromate "faster"?