Term - Reciprocity failure
|Reciprocity failure||SWPP and BPPA Photographic Glossary|
Sunday 23rd November 2014
It occurs in photographic emulsions when exposure times fall outside a films normal range. At these times an increase in exposure is required in addition to the assessed amount. This can be achieved either by increasing intensity or time.
Information provided by: SWPP BPPA
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