RE: gum/dichromate ratios

I use 1 part of saturated dichromate to 2 or 3 parts of gum/pigment mixture.
My gum is commercial 14 baume. Less toxic and expensive chemicals (ammonium
dichromate) the better. As you can see the ratios are flexible and you will
do best finding your own workflow.
Marek M
Houston

>From: trevor cunningham <tr_cunningham@yahoo.com>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: gum/dichromate ratios
>Date: Wed, 09 Nov 2005 20:57:00 -0800 (PST)
>
>I've got a little brown bottle of Dichromate solution
>with crystals on the bottom (from past readings this
>implies the solution is satuarated?). I have another
>container of gum solution mixed 1:1 (took a measure of
>water, added gum until the water level doubled). The
>gum is rather thick and syrupy. Wondering what
>proportions I should start out at...I am new to the
>gum thing.
>
>
>"The optimist believes this is the best of all possible worlds.
> The pessimist fears it's true" - J Robert Oppenheimer
>
>http://www.geocities.com/tr_cunningham
>
>
>
>
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Received on Thu Nov 10 07:56:55 2005