| Chapter 6 | CYANOTYPES |
Cyanotypes, or blueprints, are light-to deep-blue images that can be inexpensively printed onto paper, fabric, and other materials. Properly made, cyanotypes are permanent and can be combined with other hand-applied emulsions as well as traditional artists’ pigments and pastels. They tend to be more contrasty (containing less middle tones) than other processes described in this book.
Astronomer Sir John Herschel of England is credited with discovering blue-printing, or heliography with iron salts, in 1842. Calling the process “ferro prussiate,” he used cyanotypes to reproduce his intricate mathematical tables. Soon afterward, Anna Atkins, the first woman photographer, saw photography’s potential for book illustration ...
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