I drew the graphs on paper and estimated the Contrast Index for each curve. Yes you could expose more next time (one stop), but that doesn't affect the information in the curves. CI by graph is somewhat subjective (the way I do it anyway) so a careful analysis could prove my numbers here are off by 0.10 on the steepest curve.
4 minutes = 0.4 CI, 5.5 minutes = 0.55 CI, 8 minutes = 0.65 CI, 11 minutes = 0.75 CI, 16 minutes = 0.87 CI
You have good tests here. You just have to decide what CI is considered Normal and work from there. I use 0.62 (but with a non-flare contacted test).
p.s. I work for Kodak but the opinions and positions I take are my own and not necessarily those of EKC.
Last edited by Bill Burk; 08-25-2012 at 02:32 AM. Click to view previous post history.