</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (dnmilikan @ May 22 2003, 11:45 AM)</td></tr><tr><td id='QUOTE'> This gives me a zone I density of .10 density above fb+fog. </td></tr></table><span class='postcolor'>
I have never understood why anyone cares about Zone I. It's density is not useful in any way since it's on the non-linear portion of the curve. Suppose you get a Zone I of .35 over f+b How do you adjust it? And even if you do find the "proper" .1 over f+b, it tells you nothing about how to adjust for the zones you do care about; namely zones III-VIII.
Before I standardized on a staining developer I used to test a new film by finding the exposure index which would get zone III up off the toe. Then I starting using pyro and now I just print them on a Grade 2 paper and judge the local contrast. My prints are much better for it.