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ABSTRACT
After a critical review of some important literature data on reciprocity law failure at high intensity exposures (HIRF) we discuss recent experimental results about HIRF in AgCl relative to AgBr fine grained model emulsions in the primitive, sulphur (S), gold (Au) and gold + sulphur (Au + S) sensitized state. Influence of the pAg during ripening on HIRF is also outlined.
Although some results are qualitatively equal on both silverhalides, there are nevertheless important quantitative differences as for example the greater effectiveness of Au in the AgCl emulsion. Interpretation of the differences is based on the idea of the stronger catalytic activity of sensitivity specks to reduce AgCl in comparison with AgBr. Recent results are also mentioned concerning the mechanism of the TAI action (Tetra-Aza Indene) in AgCl and AgBr emulsions at different intensity exposures.