From: Ryuji Suzuki (rs@silvergrain.org)
Date: 10/27/03-09:34:15 AM Z
From: Judy Seigel <jseigel@panix.com>
Subject: Re: Test for Silver Metal in Print?
Date: Mon, 27 Oct 2003 09:26:09 -0500 (EST)
> Couldn't you just (on a scrap print) do a silver bleach -- potassium
> ferricyanide or the like -- and then fix?
That's a good test if you are concerned about the stability of image
against oxidative attacks but it wouldn't be a good test for detection
of metallic silver. If silver surface is converted to something that
cannot be bleached due to the toning process, for example, you'd get a
false negative, while you might be converting the image completely to
something non-silver that also gets bleached, leading to a false
positive.
-- Ryuji Suzuki "Reality has always had too many heads." (Bob Dylan, Cold Irons Bound, 1997)
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