Response to FP 4 in Rodinal

Additionally, the reason Rodinal is known as a high acutance developer is that it contains no sulfites and therefore produces no solvent action to reduce grain size. What you get is the inherent grain structure of the film. I have no doubt it will produce a higher acutance than D-76 with most films. Apparent grain will be reduced with D-76, but so will perceived sharpness. Which is not to suggest that D-76 is not a great developer for certain applications.

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