From: pete (email@example.com)
Date: 02/18/03-11:50:49 AM Z
How about a 1% solution of sulphuric acid as a clearing bath this has worked
for me in my TemperaPrint process.
> One of the problems that I've always had with reversal deveopment is that
> I never seem to get completely rid of the yellowish/greenish/brownish stain
> left over from, I presume, the dichromate bleach, I've tried clearing baths
> other than just the sulfite with not too much success. I tried the
> permanganate bleach long enough ago that I've forgotten the results, but
> obviously they weren't encouraging. Naturally, there is always the odd time
> when everything comes out just right with no apparent change in technique. I
> think they (the great they) do that just to make us even crazier. Do you have
> any insight as to what might solve this problem?
> One of the reasons that I pursued reversal processing in the first place
> is that theory says that the more sensitive (and larger) film grains which
> develop first, are then removed in the bleach leaving the finer half of the
> silver bell curve to create the finished transparency. I would have to say
> that my observations tend to bear this out, and make it tantalizingly worth
> doing, especially with 35mm, and 4x5 can be extraordinary. They also bear out
> the fact that you have to be about as careful as is if you were exposing
> color transparency film if you want consistant results. Thoughts?
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