Infrared Detection of Paint Layers

[Andy Finney <andy@xxxxxxxxxxxxxxxx>]

Jeff asked Clive:

>I'm interested in using
>infrared film for paint investigations.  Specifically, can infrared film
>detect paint patterns under a layer or under several layers of old paint?
>     Do know where I could get some information on this type of research?

There is information in Clark about this. Basically, infrared can 
sometimes penetrate the canvas (or vellum) on which the painting is 
made so you see the deepest paint layers from behind and sometimes 
the pigments themselves.

There is an example set of images in the book with references to work 
at Harvard University, Pennsylvania Museum of Art and the 
Metropolitan Museum of Art in NY. This work was all done prior to 
1946.

There is an extensive bibliography on this particular subject and I 
could fax this or send a scan if you're interested.

[Clark, W - Photography by Infrared (2/e): Chapman Hall 1946]

Andy Finney
www.invisiblelight.co.uk
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