Re: [APML] Hypered film-2 month chamber storage- Still good?

["westergren" <westergren@netzero.net>]

I should explain that the reason I tested "old" hypered film was that I had
some in the freezer.  My policy up until very recently was to always use
fresh hypered film for AP.  Last April when I started a series of film
tests, I ran out of forming gas so I looked in my freezer and found a few
old rolls that for some reason I hadn't used (probably the weather was bad
so I didn't set up for AP).

I was very surprised when I found that hypered PJ 400 gets better with age.
I have compared fresh, 4 month old and 22 month old.  The 4 month was the
best, but the 22 month old was second best.  These are shown on my web site
at http://home.nethere.net/mpd/FilmTestData/FilmTestData.htm

I have also tested some PPF 400 fresh and 4 month old with similar results.
Now I'm in the process of exploring this phenomena with other films.  This
will necessarily take several months because I am out of old film.  For
everyone's info, I am testing this effect on Royal Gold 200, a film that
benefits a lot from hypering.

Don

----- Original Message -----
From: "Herm" <hermperez@worldnet.att.net>
To: <astro-photo@seds.org>
Sent: Monday, July 08, 2002 3:51 PM
Subject: Re: [APML] Hypered film-2 month chamber storage- Still good?


> a new record!.. ok, where do we send the prize to (g)..
>
> "westergren" <westergren@netzero.net>  wrote:
>
> > I tested hypered PJ 400 stored for 22 months, and it
> >was better than fresh.
>
> Herm
> Astropics http://home.att.net/~hermperez
>
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