RE: Brands of Infra-red film???

[jason.revell@xxxxxxxxx]

>also, in Astronomy magazines you can usually find hyper-sensitizing
manifolds for hypersensitizing film >for astronomical photo's. What does
this hypersensitizing do to the film, is it similar to infra-red film?
>ghosthunter@xxxxxxx
>ICQ# 6098220
>http://www.ghgcorp.com/ghosthunter

Hypersenatising film is done to make it more sensitive to light.  It
normally gives 1-3 stops more speed but at dramatic increase in grain size.
Their are a few solutions you can use for this method, but the one I use is
a 0.5% solution of ammonia.  I use it on Kodak's LPF4 lith film so I have
never tried it on panchromatic film but it used to be quite common practice
earlier this century. It's just very difficult to get a even effect on the
film.

Jason Revell
jason.revell@xxxxxxxxx
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