try here to find nitric acid.
http://www.brainerdchemical.com/frameset_cat.htm
this site has a couple of toning recipes too:
http://www.bostick-sullivan.com/c_cyano.htm
Scott W.
----- Original Message -----
From: "dennis vinciguerra" <VINCIGUERRA3@compuserve.com>
To: <Pinhole-Discussion@pinhole.com>
Sent: Thursday, October 24, 2002 8:22 PM
Subject: [pinhole-discussion] toning cyanotypes
Hello all,
Certain cyanotype images work very well in blue, some in brown but then
there are those that need to be black. The formula I have calls for nitric
acid but I'm not having any luck locating it. Anyone have either a source
or another black toning formula ?
Thank you,
Dennis
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Received on Thu Oct 24 21:12:31 2002
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