</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (dnmilikan @ May 4 2003, 10:48 AM)</td></tr><tr><td id='QUOTE'> In response to your question, as it applies to black and white processing of negatives designed for enlargement, the determiner of the proper time/temperature correlation would be the density of the highlights in the negative. This would ultimately determine whether the negative would print with a full tonal range. (This assumes that the photographer is exposing the scene to gain adequate shadow detail and is cognizant of the desired development of the negative).

Typically, the contrast range of a properly exposed and developed negative would be on the order of 1.20-1.30 (above FB+fog) for a negative designed for enlarging with a diffuse light source and on the order of 1.10-1.20 (above FB+fog) for a negative designed for enlarging with a condensor or point light source. The means by which one reaches that density contrast range by whatever variable of time and temperature is immaterial. </td></tr></table><span class='postcolor'>
I appreciate your response. I was hoping the end results would be the determining factor, but I was concerned if the cooler chemistry would actually fail to perform in a manor that might not be noticable right off but would age badly. I am gathering the answer is no, for b&w film and negatives.

I am afraid I am at a complete loss at to the FB+fog and so on, but I&#39;ll get hopping. I bet I can find some article or book somewhere that explains it to me, so next time I will understand better.