Permanence of color photocopies

Anyone know anything about the permanence of color photocopies?  I'm
curious about their potential as replacement pages for purloined plates.

Normandy Helmer
Preservation Unit
University of Oregon Library
(503)346-3114

                                  ***
                  Conservation DistList Instance 5:16
                  Distributed: Monday, August 26, 1991
                        Message Id: cdl-5-16-006
                                  ***