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. Tony
Tony Gonzalez is an artist currently living in New York City. He received his BFA from the Cooper Union School of Art and his MFA from Yale University. In addition to working as a fine art photographer, Gonzalez has taught photography for 30 years including at The Cooper Union, Pratt Institute and New York University. Since 2002, Gonzalez has been teaching full-time at Queens College, CUNY and is currently a Tenured Professor and Deputy Chair of the Photography & Imaging program. Gonzalez is a contributing author for The Book of Alternative Photographic Processes, Second Edition and Third Edition by Christopher James and is featured most recently in the news book Gum Printing, A Step-by-Step Manual Highlighting Artists and Their Creative Practice by Christina Z. Anderson and Alternate Processes in Photography by Brian Arnold.
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