Response to Water and Grain

This business of grain 'growth' after development is a complete myth as far as I can tell.
Kodak state in one of their technical pubs that "Contrary to widely held opinion, there is little migration or physical joining of individual grains.". An online version of that paper can be seen here.

Anyway, I think you could prove this for yourself very easily, one way or the other.
Make a print from a section of a neg, large enough to see the grain clearly. Re-wash the negative for an extended time, and then reprint the same section.
If you can show any visible difference in the before and after prints, then I'll donate an unspecified prize to you, or to a charity of your choice.
The size of the prize will be commensurate with the degree of grain growth shown.

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