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The photographic negative : written as a practical guide to the preparation of sensitive surfaces by the calotype, albumen, collodion, and gelatine processes, on glass and paper, with supplementary chapters on development, etc., etc. (1888)

Burbank, W. H. (William Henry), 1853- · New York : Scovill Manufacturing Co. · leaf 101

An illustration from The photographic negative : written as a practical guide to the preparation of sensitive surfaces by the calotype, albumen, collodion, and gelatine processes, on glass and paper, with supplementary chapters on development, etc., etc., 1888, leaf 101
85 COLLODION EMULSION. using it ; or, c, to tlie bromide of silver being too coarse, owing to improper emulsification. Difficulty in flowing the emulsion : due to a deficiency in the solvents. The fllms leave the plates : the pyi’oxyline was too tough ; use a more powdery kind.

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