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Phil: I read the article. I was not able to get a good exposure with my enlarger lamp (V54). As I recall at EV = 4 I was underexposed. So I setup a photoflood with dimmer - as I pointed out in other posts. I am testing FP4 only. I do not recall all my data, but for my first family of tests (8, 11, 16, 22 using a vigorous PMK solution) I thought I had found the right exposure. I ended up without toe info for 16, 11 minutes. So I adjusted accordingly and ended up using 7 1/4 EV at 0.1 seconds. This ended up with perfect exposure with complete toe data for all times 4 thru 16. I have run two tests now and all data is complete for a family of curves.
So I assume I should use 2.4?
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