Photocopy-resistant colored papers

On April 1st, Luis Nadeau asked if there were colored archival papers
that couldn't be copied.

I had a news item about a paper that couldn't be copied in the July 1989
Alkaline Paper Advocate, but as far as I know, its archival qualities
have never been tested:

   "There is a kind of paper that cannot be photocopied or faxed,
    because it supposedly traps the light emitted by the copy or fax
    machine.  Perhaps its color (deep burgundy) has something to do with
    it.  Nocopi (pronounced no-copy) International Inc. holds the patent
    to it and Hammermill (Erie) and Wausau (Brokaw) manufacture it with
    the aid of special dyes provided by Nocopi.  Pink and yellow sheets
    are in the future.  Sales are big to governments and other
    organizations concerned with security.  Regina McGrath has a 2-page
    article on it in the April Pulp & Paper, p. 175-6.  She mentions use
    of Nocopi for computer manuals, videocassette labels, bar codes on
    ID cards, tickets to rock concerts; also for a felt highlighter to
    keep highlighted parts from being copied (in development)."

Ellen McCrady

                                  ***
                  Conservation DistList Instance 8:82
                   Distributed: Sunday, April 9, 1995
                        Message Id: cdl-8-82-001
                                  ***