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variable-contrast paper

Black & white printing paper that changes contrast when exposed to different coloured light. A yellow filtered light produces lower contrast, while magenta increases contrast.

ephotozine

variable-contrast paper

Photographic paper that provides different grades of contrastwhen exposed through special filters.
mirglossary

variable-contrast paper

Photographic paper that provides different grades of contrast when exposed through special filters.
kodakglosarry1999