Re: [APML] Hypering LE400 in Lumicon 300?

["David Gimenez" <davidanna@jazzfree.com>]

Hi Steve

Each hypering setup is different, small changes in the process (like 1ºC
temperature) may yield large changes in the result. You should test your
negatives for different hypering times and decide which is the optimum (see
http://www.astrocruise.com/densmeas.htm for a cheap method of density
mesurement). After a lot of tests and the unvaluable help of Jerry
Lodriguss, I found 5 hours was the optimum in my case for LE400 (Lumicon 300
kit + home-made 50ºC regulator). Anyway, I believe that an additional half
an hour should not "kill" the film.

I hope this help

David Gimenez i Rocamora
Corbera de Llobregat
mailto:davidanna@jazzfree.com
http://eureka.ya.com/astrophoto/index.htm

----- Original Message -----
From: "steve banbury" <banburys@sonic.net>
To: <astro-photo@seds.org>
Sent: Sunday, August 04, 2002 7:59 AM
Subject: [APML] Hypering LE400 in Lumicon 300?


> I'm hypering my very first batch of 4 rolls of film tonight, and have
gotten some pointers from Don Westergren.
> I'd love to hear any advice anyone else cares to share about length of
time I should hyper for.
> I am running + 3 psi Lumicon gas, Lumicon 300 kit, and a measured temp of
47 deg C on the Lumicon 50 deg C thermostat.
> I have been cooking for 4 hours now, and need to decide when to quit.
>
> I have seen numbers ranging from 6 to 7 hours on various websites. Will a
half an hour one way or the other "kill" the film?
>
> Any and all advice would be appreciated.
>
> Thanks--Steve
>
>
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