Quote Originally Posted by Stephen Benskin View Post
This example shows HP5P 135 developed to a CI of 0.56 in Xtol. The graph on the left shows normal exposure with a resulting negative density range of 1.06. The graph on the right shows a three stop "over" exposure with a resulting negative density range of 1.02.

Attachment 69433
Nice to see your program coming to the aid of a forum discussion!

PeterB, The reason our curves end abruptly on the right, is that "we" try to catch the toe in our tests and haven't done studies of gross overexposure... All it would take to see how far out the straight line extends... would be to remove a ND filter from the well of the sensitometer, pop a test, and develop and measure it. I believe there is a great long straight line ahead.