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Original Articles

Reciprocity-Failure Characteristics of the Internal Latent Image

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Pages 256-259 | Received 10 Jun 1963, Published online: 22 Jul 2016
 

Abstract

It is shown that the internal-image reciprocity-failure curves of members of a grain-size series of unsensitized emulsions are all of the same basic shape. With increasing grain size the optimum of the reciprocity-failure curve shifts to shorter exposure times so as to maintain the optimal intensity roughly constant. As a result the optimum tends to be associated with a fixed rate of absorption of quanta per unit volume of silver halide. This suggests that through a grain-size series the number of internal sensitivity centres per unit volume and their overage trap-depth tend to remain invariant with grain size.

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