| Sandy,
Thank you for your work on this. The contrast difference graded to VC materials is of particular interest and parallels my actual printing difference in the darkroom. My results have indicated that the densities Ansel Adams proposed in "The Negative" no longer apply in my printing with my materials (Forte and Oriental graded, and VCFB).
As I read your curves they indicate that Pyrocat does offer better tonal separation throughout it's curve by virtue of the shorter toe and the absence of the shouldering indicated with PMK.
Did you do any work on the issue of stain color in the compression of highlight tonal scale between PMK and Pyrocat when used with VC materials and the effects of the stain color as it effects the colors of VC filters? |