7502Re: Plastic Plates Curling...
- Feb 8, 2007John
It's plastic. Once cured, it's all downhill from there. Moisture is
not retained by polymer, at best a certain threshold of moisture
preserves its initial state in the short term. The molecular structure
of manufactured polymers, however, has not proven stable in the long term.
As much as the environmentalists condemn plastics, the
preservationists wring their hands about how to save them. The
Smithsonian can't keep astronaut suits from disintegrating much less
keep Barbie Dolls from leaching.
> Perhaps our California group members have a more stable environment
> so they do not notice the vargaries of moisture as it relates to
> photopolymer plate materials. It does seem that the plates are
> capable of some retention or loss of moisture after polymerization.
> John Henry
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