Re: InfraRed and Water - A comprehensive approach - Final Chapter

["Karl and Anita Shah-Jenner" <shahjen@xxxxxxxxxx>]

From: Charles Andrew :

>HI!  I am interested Keith Krebs comments that "in fact, if you want to see
>thru water, concentrate on the blue and UV rays of light...have there been
any
>photos of humans that are more that surface shots using this type of light
considering
>that they are mostly water?  I suppose the answer would be no or it would
be used in
>medicine.

Hi there, sorry to all for throwing my proposed answer to the list then
disapearing!  I was experiencing computer problems but now I'm back to take
the flack! :-)

Yes, there have been and still are many photos taken with 'blue only'
light.. look to the earliest and simplest films (orthochromatic).  These are
blue sensitive only and although they don't "penetrate" the body (or at
least, not in any way that I can percieve), they are remarkable at NOT
showing veins, blemishes, scars, lips (!) and other blood rich, or dermally
depleted, tissue.

If you want to try some - grab some kodalith and (the fun bit!) develop it
by inspection in paper dev in your normal printing darkroom under a red
safelight.  a film that's cheaper again is <deep breath!> Kodak  Eastman
Fine Grain Positive Release Film.  Both of these films have no antihalation
layer so you might have to compensate for this fact and they also have a
clear base - if you want to make transparencies

Karl
West Australia



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