Fine Grain Photographic Development | Zendy

George E. Higgins | Zendy

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Fine Grain Photographic Development

Author(s) -

George E. Higgins

Publication year - 1939

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.1707236

Subject(s) - emulsion , materials science , borax , grain size , photographic emulsion , metallurgy , chemical engineering , chemistry , engineering , raw material , organic chemistry , silver halide

The effect of different fine grain photographic developers upon the effective emulsion speed and graininess of photographic materials was studied quantitatively. Fine grain developers were found to be more effective in reducing the graininess of fast, coarse grain emulsions than of slow, fine grain emulsions. The effective emulsion speed of slow, fine grain emulsions when developed in an MQ borax developer was found to be at least equal to that of a fast, coarse grain emulsion when developed in an ultra‐fine grain developer which gave negatives of as low graininess on the fast emulsion as the MQ borax gave on the slow emulsion. Slight improvement in graininess can be obtained by using ultra‐fine grain developers on fine grain emulsions, but only at some sacrifice of effective emulsion speed.

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