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Old 03-26-2003, 04:33 PM
Richard T Eger Richard T Eger is offline
Join Date: Jun 2000
Location: Seaford, DE, U.S.A.
Posts: 23,700
Default Ultraviolet radiation and its effect upon old documents

The following is from within a thread on 12 O'Clock High! and is in response to a question about a wartime map:

Rabe Anton
Luftwaffe Map
Fri Feb 14 21:55:39 2003

I deduce that you intend to have your German map framed for display. As an archivist, may I caution you against the display of the map you have described. Continuous exposure of paper, especially poor quality and/or old paper, to light will rapidly degrade both the printing and the stock itself owing to the effect of ultraviolet radiation present in ordinary lighting. A certain measure of protection may be obtained by utilizing special filtering glass, but this is expensive and has a finite effective life. If you value your relic and care about its preservation for future generations, don't display it on a day-in, day-out basis.

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