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Chapter Viii. Contains the Theory of the Production of Positive

A Manual of Photographic Chemistry, Including the Practice of the Collodion Process · T. Frederick Hardwich — chapter 10 of 60 · ~34 words · public domain

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Photographs upon paper. In this Chapter will be found an explanation of the somewhat complex chemical changes involved in printing Positives, with the precautions which are required to ensure the permanency of the proofs.

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A Manual of Photographic Chemistry, Including the Practice of the Collodion Process · The Wunder Library — complete classics, free to read, with narration.