Response to effects of developer dilution

The theory (which Mark mentioned) - assumes the developer is high in solvent effect and physical development. On the other hand, FX-1 type developers don't have either of these and the effect will be different. Properly formulated ascorbic acid developers are interesting because in some aspects they resemble physical development yet visual sharpness can be very high. If poorly buffered developers are combined with chemically-hungry films at a large dilution ratio, the working pH of the solution drops very quickly and this adds another effect. On the other hand, well buffered formulae are more stable in this effect. I think it is better to say there is no general rule for dilution.

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