[LargeFormat] Help with interpretating film speed test
LauvoneT
largeformat@f32.net
Mon Apr 21 14:50:35 2003
HI,
I have just run a test on Ilford FP4+ developed in
Perceptol 1:3 for 14.5 minutes at 75 degrees. The
agitation was constant shuffling in the tray, two
sheets were all that was developed.
I read an unexposed but developed sheet. The reading
was .11
so far so good, but the next densities ran .33, .54,
.75, .95
This is a density change of about .20 per stop. Now,
my question is this, should it be .20 above base for
the first step?? Should I redo the test?? Or is this
good results for that film, developer combination??
Some advice from you experienced densitometer folks
will be greatly appreciated.
OH, I rated the film at 125 for the first shot, then
opened up for each succeeding shot. Shutter speed was
kept the same, the F stop was changed.
Thanks for any advice, help.
Lauvone
=====
www.Lauvone.com
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