May 25, 2013
Thanks. I’ve been using Ammonium Dichromate for my sensitizer for over ten years. Christopher James prefers the Potassium Dichromate and says it gives less contrast than the Ammonium Dichromate. I once tried (unsuccessfully) using Potassium Dichromate a couple of years ago, but since all of my research and results are based on using Ammonium Dichromate, I’d decided to stick with what I know. Photographer’s Formulary also requires additional paperwork to be submitted when ordering Potassium Dichromate. Hope this helps.