Abstract

AbstractThe mass and distribution of photolytic silver in the solarization region of a chlorobromide, halide-exchange emulsion has been determined by using radiochemical and autoradiographic techniques in conjunction with latent-image bleaches.For this particular emulsion, in the region where developed density decreases with increasing exposure, the mass of surface silver also decreases whilst internal silver increases. This is a direct demonstration of the rehalogenation theory of solarization.The behaviour of surface latent image towards bleaching solutions, as determined by non-solvent surface development, indicates that although the number of latent-image centres, taken over the emulsion as a whole, decreases with increasing exposure, the average size of the remaining centres continues to increase.

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