From: Katharine Thayer (kthayer@pacifier.com)
Date: 11/17/02-02:03:46 AM Z
Clarification: my second sentence doesn't read as comprehensible to me
as did when I wrote it; what I meant to express there is that it doesn't
make a lot of sense to me to limit the ammonium dichromate to the same %
solution by weight that potassium dichromate is capable of, and for that
reason the argument seems rather beside the point. Yes, at the same %
solution they act about the same, so what? The important point is that
at their maximum concentrations, they are different.
kt
Katharine Thayer wrote:
>
>
> My comments about ammonium vs potassium dichromate referred of course to
> the two chemicals in a saturated solution, but you're right, I should
> have said. At any rate, since it would be impossible to mix potassium
> dichromate at the same % solution that you can mix ammonium dichromate,
> and the range of concentration at which you can mix them both is quite
> limited, it seems a rather esoteric argument to me. My point was that
> using each at a saturated concentration, ammonium dichromate is faster
> than potassium dichromate but can be too fast for a very intense UV
> source, which is important information for a beginner to have.
>
> Katharine Thayer
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