RE: Van Dyck and Kallitype
Interesting. I was not aware of this distinction.
However, there is a practical side to a POP process that comes into play, and that is self-masking. With processes such as salted paper there is considerable self-masking. With VDB the print out image is not as dense as with salted paper, but it is much greater than with either kallitype or Pt./Pd. where there is very little self-masking.
Self-masking is a good thing in moderation, but in a worse case scenario where you try to print a negative that has too much contrast for the process the shadows will print in first, and then just bake while the highlights print in. This gives murky shadows with little separation.
In practice, however, very few people make negatives with enough contrast for VDB (or salted paper or albumen, for that matter), so the highlights print in before the shadows are complete, which gives low Dmax.
On Wed, 20 Sep 2006 17:16:50 +0300, "Loris Medici" <email@example.com> said:A) You expose using sunlight since it's a print-out process unlike develop-out Kallitype, and that's a big big plus when using sun.Both are print-out processes. The term "developer" is technically a misnomer in processes where the image is actually formed during exposure (whether it is visually different in color or density from the unexposed area).