Re: Dichromate of choice

SCHRAMMR@WLSVAX.WVNET.EDU (filmpro@cris.com)
Fri, 12 Jul 1996 22:48:35 -0400 (EDT)

>>Potassium can only be dissolved to about 11% for a saturated solution si
is slower than
>ammonium if you are working with saturated solutions. It has the advantage
>that it can be dissolved in alcohol which dries more quickly which can be
>important if you are dichromating gelatine forn carbon prints.
>
>> and Ammonium Dichromate ...A saturated solution is around 33% so it is
faster than the potassium. It will not dissolve in alcohol.

Would you use Potassium Dichromate dissolved in alcohol in Gum printing
process?

What kind? Isopropel, Denatured, etc??

In Gum printing is a solution in the 20-33% typical? The formulas I've
had access to are 10% and 15%.

Does the higher percentage solution effect contrast as well?

I'm impressed with the knowledge and experience of this group, and how
quickly I've received valuable responses.

Thanks!!!

Macy Garcia