You wrote, "I keep the Van Dyke sensitizer in the refrigerator
in a blackened bottle."
I take it that means in one bottle (singular). The Van Dyke formula I
use calls for three seperate solutions which are combined in equal
parts just before use unlike Kallitype where everything is mixed in
one solution and allowed to "ripen" for 3 days before use. I am wondering
if something is happening as a result of premixing the Van Dyke sensitizer,
that is, I wonder how long you can keep it even in the fridge. There is
nothing wrong with your coating technique. Any other opinions?
Bob Schramm