Why Kodak Film Sensitivity Depended on Cows and Mustard
Источник: Fstoppers ·
The working dose Samuel Sheppard wrote into his patent was 2 to 3 grains of thiosinamine per 100 pounds of dry gelatin, which works out to roughly three or four parts per million. Added to a gelatin stripped of its natural sensitizer, that trace could raise the emulsion's sensitivity by a factor of ten or twenty. Nudge it upward and the film fogged. [ Read More ]
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Why Kodak Film Sensitivity Depended on Cows and Mustard is a статья discovery curated from Fstoppers. The working dose Samuel Sheppard wrote into his patent was 2 to 3 grains of thiosinamine per 100 pounds of dry gelatin, which works out to roughly three or four parts per million.
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