David Michael Kennedy (david@davidmichaelkennedy.com)
Mon, 15 Mar 1999 18:27:36 -0700
the standard (whatever that means) is 200mls of fresh pot. oxalate with the
correct # of drops for the contrast mix developer you are replenishing added
to the working developer solution. I usually replenish after about 10 20x24
prints and pour off enough old developer so that when I add the 200mls it
equals the volume of working solution I had to begin with.
David
-----Original Message-----
From: V6263@aol.com <V6263@aol.com>
To: alt-photo-process-l@skyway.usask.ca
<alt-photo-process-l@skyway.usask.ca>
Date: Monday, March 15, 1999 3:49 PM
Subject: replenishing dichromate for pt developer
>I use sodium dichromate as contrast agent in oxalate developer for pt/pd.
>Lately I have had the problem that in reprinting successful images I now
have
>to go several steps higher in contrast or add hydrogen peroxide to equal
>previous contrast. Has anyone had this problem or explored replenishing the
>dichromate? Does it wear out? Thanks.
>V. Schrager
>
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