V6263@aol.com
Mon, 15 Mar 1999 17:45:18 -0500 (EST)
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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