Uh, the prewet, IIRC, is just to make delivery of the developer
"smoother". The idea is (was?) that if the film has had a bit of a
soak, the residual water on the film after dumping the soak will deliver
the developer more evenly. I'm not sure if this was ever tested in any
way that was really meaningful, but I used to use the soak for sheet
film pretty consistently. But I abandonded it for roll film since I
neveer noticed any problem with streaking or uneven development by
omitting it with roll film.
Earl
Walt Wayman wrote:
>Now about the prewet, which is a really silly term because you can't really
>pre-do anything, so I'll just call it the first water bath. (I mean, I see
>directions that call for preheating the oven. Excuse me, but isn't that
>really just heating the ****ing oven?) Anyway, I'm obviously pussyfooting
>around and avoiding the question of why to do it. I know I once knew, but now
>I've forgotten. All I can say is that's what the J&C directions say to do.
>
>I wish I could authoritatively tell you that it dissolves and removes the
>antidefractional postextemporal and defuzzificational coatings so the
>developer can reach the previously hermetically sealed and renegade-proton
>shielded emulsion and go to work immediately, but that would not be really
>truthful. Or maybe it would be and I just can't remember. I do know,
>however, that it does something, because the water comes out looking like
>Kool-Aid. I'm still not sure what flavor it is, though the grandkids don't
>seem to like it much. :-)
>
>Walt
>
>
>
>
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