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Re: did I overdevelop?
I wrote:
>>I am trying to work out some times for developing negatives for palladium
>>and cyanotype printing. I just measured a negative that I processed for 14
>>minutes in D-76. It's Tri-X, shot at 250. The density range was 1.55,
>>about what I wanted, but the overall density seems high: the useful
>>shadows were at about .85, and the highlights were at 2.4 (zone VII or
>>VIII). Did I overdevelop?
Sam wrote:
>No. You did not over develop. You over exposed instead. Remember that
>when you change development (for increased density range, for
>example) you need to change (in this case cut back) exposure as well.
I was going by the guidelines in Dick Arentz's book, which says that if the
subject brightness range is 7, to expose Tri-X at 250. I have calibrated
my camera, and I know that that lens shutter speed is accurate, so that
normally, when making a negative for silver printing, I shoot Tri-X at 400.
Also when shooting color film I can use the manufacturer's film speed.
So, I assumed that I could use Arendt's times in the appendix of his book.
I wonder if that was a wrong assumption? I was thinking of trying again
and cutting back on the development time by about 20%. His development
times were for tray development, and I was using a daylight tank.
--shannon