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How is commercial blueprint paper different from cyanotype photo paper?

April 26, 2017Blueprint Commercial cyanotype different paper photo

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How is commercial blueprint paper different from cyanotype photo paper?

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Cyanotype paper is a negative process photo paper, and a variety of formulas exist. Sensitivity is similar to commercial paper at around 7 speed, and fixing varies with the formula. The cyanotype process is one of the oldest known photographic processes.