The sulfite acts as a reducing agent. It clears the dichromate by reducing
it to an inactive form.
Air can also oxidize sulfite to sulfate, ruining it as a clearing agent.
Therefore, I would not recommend storing it for more than a day. Going from
Saturday to Sunday would probably be OK, however.
My thoughts would be similar to reusing glyoxal and over-using fixer. The
sulfite (and others) are relatively cheap, particularly compared to your
time and other materials. How many people would dilute platinum salts or
short a mixture of good pigment in gum printing, just to save money? The
same applies to the rest of the process.
----- Original Message -----
From: "Darryl Gage" <dgage@localnet.com>
To: "AltPhoto" <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, August 21, 2004 7:06 AM
Subject: Sodium Bisulfite
> After clearing a 2 or 3 gum prints, is the sodium bisulfite solution
> storable for later use or should I just dump it and make a new solution
> when needed? Thanks.
>
>
> Darryl M. Gage
> Forestville, NY
>
> "Strange and beautiful are the stars tonight..." Blue Rodeo
>
>
Received on Sat Aug 21 14:45:45 2004
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