Classifying resins

I am looking for articles regarding classification of products used
in conservation, mainly resins. I do recall reading that some
products belonged to different groups (A: 100 years, B: 75, C: 50,
etc.) depending on their ageing characteristics, reversibility,
unexpected changes, etc. Any information on the subject is welcomed.

Isabel Herraez


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                  Conservation DistList Instance 18:24
               Distributed: Wednesday, November 24, 2004
                       Message Id: cdl-18-24-026
                                  ***