From: Jeffrey D. Mathias (jeffrey.d.mathias@worldnet.att.net)
Date: 06/06/00-05:31:03 AM Z
terry roth wrote:
> I am making ZIATYPES from a kit I got from B&S over a year ago, still
> excellent D-max and beautiful tonality.
> > > ----Original Message Follows----
> > > From: DAVID DISTEFANO ...
> > > What is the shelf life of Ferric Ammonium Oxalate sol. #1
The first place one will notice fatiguing of the sensitizer is in the
highlights as fogging; this is a bit after the time to replace the
sensitizer. Eventually depth, substance, smoothness, tonality, and
D-max will become hindered.
-- Jeffrey D. Mathias http://home.att.net/~jeffrey.d.mathias/
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