Re: [APML] N2 introduction point

["Bobby Middleton" <bobm@koyote.com>]

>
> Bobby:
> The purpose of an N2 purge is to keep the film dry (free of water in any
> form), actually the emulsion of the film. The film base isn't affected by
the
> N2 purge, unless it's from temperature. Therefore, wherever the emulsion
is,
> is where the N2 atmosphere should be. The N2 can be introduced anywhere,
as
> long as it can get to and replace the air near the emulsion with dry N2.
This
> includes the supply and take-up spool areas of the camera as well as the
> "camera box".
> Kent Kirkley

That sounds right.....it needs to be in front & back. Has anybody ever
done a check to see if enough gets through to the other side of the film?
Anybody know a simple way to check this? My recent possible film
creep has me wondering if my one-sided N2 purge is good enough.
Bobby Middleton




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