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Subject: Ink


From: John Chalmers <jpchalmers>
Date: Tuesday, June 30, 1992
The Forensic uses of ink were discussed by Antonio A. Cantu of the U.S.
Secret Service at a Forgery Conference in Houston in November, 1989....
In addition to the information about ink formulas being changed about
every 3.5 years, he also discussed PAPER watermarks and batch tracing as
a forensic device:  modern watermark images contain subtle periodically
introduced differences, and the paper pulp itself has a uniquely
identifiable chemical or other characteristic or mark, periodically


                   Conservation DistList Instance 6:7
                   Distributed: Sunday, July 5, 1992
                        Message Id: cdl-6-7-004
Received on Tuesday, 30 June, 1992

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