TAGGED Paper Degradation

Of Paper and Permeability

For decades, preservationists have helped protect historic documents, such as centuries-old maps, by placing them in clear envelopes. Enclosing them in these clear envelopes provides mechanical support to help keep these old, brittle treasures from crumbling while also allowing the public to see and sometimes handle them. But paper degradation isn’t a self-contained event, says Patricia McGuiggan.