Unless it was dissolved in chemically pure distilled water, more likely it
reacted with all the guck that's in most of our tap waters. I know our
"drinking" water here has algae (which can be readily oxidized) and calcium
(calcium chromates are insoluble - and heavy metal chromates make good
pigments!).
Sil Horwitz, FPSA
Technical Editor, PSA Journal
silh@iag.net
Visit http://www.psa-photo.org/