It should also be mentioned that sharpness with any given developer is highly dependent on both dilution and type of agitation. Developers like D76 that have a lot of sulfite in them become sharper when diluted 1:1 or 1:2 because there is less solvent action. Most pyro type developers become sharper with higher dilutions because of local developer exhaustion. And most developers of all types are usually sharper when used with reduced agitation methods (minimal, semi-stand, stand, etc.).

Technically speaking any comparison of sharpness of any two developers should be qualified by noting the dilution and type of agitation.

Sandy King