Blueprint encapsulation

Has anyone had occasion to encapsulate blueprints which may have been
processed with ammonia? We have a large number of these in our Map
Library and at present they are housed with other materials; we are
planning to encapsulate but I wonder about problems associated with
this, although it seems better to close them up...thanks, j.

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                  Conservation DistList Instance 6:32
                Distributed: Saturday, December 12, 1992
                        Message Id: cdl-6-32-010
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