The adjacency effect in film developed by viscous materials causes image-dependent nonlinearities in the photographic image. This effect has seriously restricted the use of viscous-developed film in applications where accurate quantitative sensitometry is desired. In this paper, we present a fundamental diffusion model for viscous development that allows prediction of the developed image from the exposure distribution. A comparison of theoretical experimental results is included.
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Ehn et al. (1974) studied this question.
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