Re: Myth of Heat exposing IR film

[George L Smyth <GLSmyth@xxxxxxx>]

Bertha Adamson wrote:
> 
> Anyway, he seemed sure that he was able to record heat with IR film many years
> ago.  Now I don't know the subject so it very well could have been something
> that emitted both near and far IR, thus the confusion.  But I wonder, was or
> is there some special application, eg. military or scientific, that
> incorporates some IR technology that has caused this confusion or is it just a
> erroneous observation due to things like the "glow" of human skin on IR film
> that makes people think heat?  It would be nice to have as much info
> (ammunition) as possible to help debunk this myth.

You may wish to read "Rethinking Infrared Photography - Dispelling Myths by
George L Smyth", on my Web page.  The confusion is due to an inadequate
understanding of infrared film, and a partial understanding of thermography. 
Additionally, Kodak's Technical Data Sheet P-570 (March 1977) will assist.

Cheers -

george

-- 

Handmade Photographic Images
http://www2.ari.net/glsmyth/
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