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Abstract
The parallel development (with uncharged or strongly adsorbed active species, or without soluble bromide), in particular typical to colour processing, was recently proved to be non-autocatalytic silver growth with a constant rate until silver halide is completely reduced or a critical inhibitor concentration is accumulated. The other kinetic extreme is granular, stop-gamma development (with strong anionic developers and much bromide), being typical of reversal or positive processing. It slowly exhausts instantly reduced grains, providing a quasi-linear after-induction silver growth, which has been derived from the exponential size distribution of developable latent image centres and the first-order bromide replacement from them by slowly penetrating developing anions. The nearly time-cubed toe of common mixed kinetics has been shown to be inconsistent with the common autocatalytic hypothesis and to follow from the two extremes combined. The granular development in principle and the typical mixed development initially occur on the largest latent image centre in grain and cannot give evidence for the concentration principle in latent image formation.