High contrast developer - solutions used to produce high contrast images.
High key - photograph which contains large areas of light tones, with few middle tomes or shadows.
-Sodium hydroxide - highly active alkaline accelerator used in conjunction with hydroquinone to produce high contrast developers.
-Sodium metabisulfite - used as an acidifying agent in acid fixing baths.
 See also: Hood, Finder, Shape, Filters, Focusing
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