| Chapter 8 | GUM BICHROMATE PRINTS |
Gum printing makes water-soluble pigments, such as gouache and watercolors, photographic, producing prints of subtle and wide-ranging colors on paper or fabric. Mixing gum arabic, paint, and a solution of ammonium or potassium bichromate as the light sensitizer, you can create a single or multicolored image ranging from continuous tone to high contrast. Gum printing also can be combined with traditional printmaking processes such as etching and drypoint, or with other photo-printmaking techniques from this book. Because the emulsion is delicate, patience and a willingness to experiment are essential.
One of the earliest photographic processes to be used as a personally expressive medium, gum bichromate—also ...
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