It's odd that I've made such a study of dichromate stain, since it's not
something that I encounter in my own practice, but it's interesting
because it seems so resistant to explication.
At any rate, the other day I said that brown dichromate- stained gum
turns deep green when scraped off the support when still wet, and that
dichromate stain treated with a clearing agent turns blue, not green.
Today I've learned that that may only be true for a medium or heavy
dichromate stain. A light stain scrapes off the support brown when wet
and turns green when treated with bisulfite. So it looks like the degree
of stain is also a factor in how the stain behaves with regard to
clearing agents for example.
kt
Received on Sun Oct 17 17:39:05 2004
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