July 2017
Intermediate to advanced
374 pages
9h 41m
English
Content preview from The Practical Zone System for Film and Digital Photography, 6th Edition
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Appendix K Alternative Methods for Extreme Expansion and Contraction Development
Expansion
With modern films and developers, Expansions beyond N + 2 are difficult to achieve without a serious loss of image quality owing to increased grain and fog. In general, you should rely on higher than normal paper grades and/or negative intensification when extreme Expansion is required.
Intensification means processing the film through a special chemical bath with the intention of increasing the contrast of the negative after it has been developed and fixed. Ideally, intensification will add density to the highlight areas of the negative without greatly increasing grain. Photographer’s Formulary offers a prepared formula called Chromium Intensifier that ...
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