Gum Bichromate over Platinum Printing

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Our Gum Bichromate over Platinum class with Diana H. Bloomfield was a hit! This two-day class led our participants through not one, but two beautiful hand-coated processes that combined together created stunning, unique prints. During day one our students made platinum/palladium prints of their images, which were beautiful on their own; in day two, they added a layer of gum bichromate over the top and made an additional exposure, which took their prints to another level. The end result is a cross-processed print with the sharpness and tonality of a platinum print, but with a color wash and additional details from the gum bichromate! 

Platinum prints processing on day 1

We exposed both processes to UV light indoors via our UV exposure units

Coating the platinum/palladium emulsion onto paper

Finished prints from day 1

Diana demonstrates coating the gum layer over the platinum print

 

 

 

Image by Karen Hymer

Image by Karen Hymer

Gum bichromate prints develop in water, and can be gently manipulated with a paintbrush 

Finished gum over platinum print – image by Nancy Miiller

Images by Scott Wrage

Images by Siegfried Rempel (L) and Mary Nation (R)

Diana discusses the class’ finished prints at the end of day 2  

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