From: Sam Wang (stwang@mindspring.com)
Date: 04/17/00-10:03:13 PM Z
Part of the reason for the differences in cyanotype printing speed
may be the thickness of the coating. For the richest tones, I double
coat, and print with pt/pd negatives - actually some of my negatives
run to about 2.1 in density range. In the brightest South Carolina
sun, the exposure often run to 30 minutes.
On the other hand, if I lay down one thin coat, I can get a full
tonality print from a .9 negative in very short time. Of course "full
tonality" here would mean having detail everywhere, but with much
lower D-Max.
Try this: dilute the cyanutype solution with equal parts water. Then
print it with a step tablet.
One interesting way to get much higher speed, though not without
problems, is mentioned in a handout from John Shafer: coat with A
solution ONLY, and DEVELOP by brushing on the B solution.
Sam Wang
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