Response to Pyro for low grain

Pyro is not a "fine grain" developer, which means it does not contain large quantities of sulfite which will reduce the size of the silver grains in the emulsion. Whatever inherent grain structure the film possesses is what you will get with PMK. On the other hand, as some of the other commentators have noted above, its stain will mask grain to some extent, the edge effects it produces will give much greater apparent sharpness, and the high values it produces will have much more detail than you can get with other developers.

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