Thanks for your question. I want to talk to our photo conservator, and
then I'll get back to you with some answers.
 
Karen
 
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Karen Motylewski                                508-470-1010
Northeast Document Conservation Center          508-475-6021 fax
100 Brickstone Square                           <[log in to unmask]>
Andover, MA 01810                               Use KM in subject field