Re: SUBSCRIBE INFRARED-PHOTOGRAPHY SCOTT DONKIN

[boblong@xxxxxxxxxxx (Robert Long)]

On Tue, 22 Oct 1996 14:38:12 +0100, you wrote:

|What is the purpose of using IR for paintings? Isn't that how they are
|able to see if anything is painted underneath? I always thought that was
|funny. Having painted for a number of years I painted over a few things
|occasionally, but, believe me they weren't anything I would have wanted
|anyone to see. Isn't IR supposed to be good for copying old documents? I

Kodak's old _Applied Infrared Photography_ booklet, if you can find a
copy, provides some interesting uses of IR in "reading" writing that
has been covered over, is on a discolored surface (blackened Dead Sea
scrolls, for instance), or has faded at the surface so that it is
invisible to pan film but readily discernible to IR.  There also is a
repaired painting examined under pan, UV, UV florescence, IR, and IR
luminescence conditions.  The emphasis is entirely on detecting the
repairs, and IR luminescence is shown to be the most effective at
doing that.

Bob Long
(boblong@xxxxxxxxxxx)

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Topic No. 23