Term - Infectious development

Infectious development

SWPP and BPPA Photographic Glossary

Monday 20th May 2013

SWPP & BPPA

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Infectious development

The development action which occurs in processing "lith" materials. The oxidation of hydroquinone produces new and highly active reducing agents, semiquinones, in the presence of a low quantity of sodium sulfite. This results in a very high contrast image.

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