From Pixels to Paint: Gum Bichromate Printing from Digital Files at Peters Valley Craft Center
Sandy Davis
August 19-23, 2011

Learn the historic processes of gum bichromate printing and cyanotype. Photo-sensitized watercolor is brushed onto paper, upon which negatives are placed during exposure to ultraviolet light. The only processing required is rinsing in water to remove unexposed pigment. Multiple layers are made to produce a luminous combination of painting and photography. In this workshop you will begin with digital captures or film negatives. Through the use of Photoshop, you will learn several ways to prepare the digital negatives that will be used for exposing the gum bichromate prints. We will explore tri-color and duotone separation options.

Beginner to Advanced
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Sandra C. Davis is a photographer whose haunting imagery is about capturing remembered moments from the past, exploring history through photographing what remains from previous eras. She prints these images using the historic photographic processes of gum bichromate and cyanotype. She has been teaching non-silver printmaking processes for ten years at The University of the Arts in Philadelphia. She also teaches photography and alternative processes at Tyler School of Art in Philadelphia and Mercer County College, NJ. She has contributed to A Non-silver Manual by Sarah Van Keuren and has work published in The Book of Alternative Processes, Second Edition by Christopher James. Her award-winning images have been exhibited nationwide and are in public, corporate and private collections. To see more of her images, go to