Began making tests about an hour later, with the idea of getting two for
one -- not only testing the cool white vs black light bulbs, but the
"ripening" of cyanotype emulsion, since I have strong evidence that it's
much weaker/paler for at least the first day.
However, as soon as I dropped solution B (the k fe) into solution A in
the dish, it precipitated out dark blue. I coated the paper and made a
print of sorts, but with heavy fogging and weak tones. Made 3 more tests
at intervals, latest this AM, same results -- except last might even be
weaker. I remixed the potassium ferricyanide from another source,
results the same. Which leaves the ferric ammonium citrate.......
Any ideas?
Judy