From: Gwen Walstrand (gwalstra@lib.drury.edu)
Date: 04/15/00-10:39:18 AM Z
I am wondering what are typical exposure times for cyanotype and whether
there's a way to speed up the sensitivity. Does the 2 parts A solution to 1
part B solution give greater sensitivity as well as greater tonal range?
I teach an alternative processes class that uses a 1500 watt metal halide
plate burner (the very low end of the plate burner market, manual
shutter...). The light source is placed about 30 inches from the vaccuum
table for greater coverage. Our typical exposures for Van Dyke, Gumoil,
Kwik Print and other processes are all between 4 and 8 minutes. Cy anotype
exposures create quite a bottleneck in the classroom. Any suggestions for
speeding up the exposure times?
Thanks in advance,
Gwen Walstrand
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