re:Dichromate

Paul Simon (psimon3@worldnet.att.net)
Thu, 02 Apr 1998 11:26:56 -0800

Potassium Dichromate, in or out of solution, is indefinitely stable. It is
sold by Bureau of Standards in solution as a primary reference titration
standard. I've used it in the lab and found it's titer never changed. It
is a strong oxidant. Perhaps it reacted with the bottle cap liner?

Paul Simon
--------------
I finally got back to tinkering with carbon printing this week, and
discovered that my 3% solution of potassium dichromate had coated the
bottle with a brownish black sediment. Is this normal? I strained the
solution through a coffee filter, and scrubbed the inside of the bottle to
remove as much of the sludge as possible. A couple of sample prints made
using the solution seemed to turn out OK, but I'm wondering how long I can
expect this solution to last?

- Wayde