Re: [APML] Rookie Hypering Advice Lumicon 600

["Jim Janusz" <jjanusz@dc.rr.com>]

OK Gerry, I'll take a shot at this.  All responses are my experiences.  See
below.........

----- Original Message -----
From: "Gerry Cichocki" <gcichocki@hotmail.com>
To: <astro-photo@seds.org>
Sent: Thursday, December 06, 2001 12:09 PM
Subject: [APML] Rookie Hypering Advice Lumicon 600


> Hello, I just purchased a 600 hypering kit (50deg & 30 deg probes) & using
> the hand pump. I  am also near sea level.
> I plan on hypering the film in the canister for now & will be using Kodak
> Supra 400 print film (which may be or is similar to royal gold 400). Any
way
> here are my questions:
> 1) Lumicon mentions to hyper for 3days/ 15psi at 30 deg. But it looks like
> many of you are only doing 4-6 hrs at 3psi at 50 deg (in the canister).
> Where do you reccommend starting. I'm aware of checking the density on
test
> rolls & will do that but I'm hoping someone already uses this film on a
600
> kit & may have a real world answer.

I never hyper color film of any type at 50 C.  As a former lab owner in a
desert community I have seen too many rolls of film ruined by heat.  The
only color I hyper is 120 PPF and I do that at 30 degrees C for 12 hours
after a minor pump down with a two stage pump.



> 2) Do you just lay the film canister in the  empty chamber or lay it in
(or
> on) the  patterson spool inside the chamber.?

When I did 35mm it was always in the cannister.  I never saw a problem of
ineven hypering and it saved a lot of wear and tear on the film.


> 3) when ready to remove the film after hypering do you need to slowly
> release the pressure inside (via the center knob or valve) or not?

Yes, via the valve if you can.  You can also pump the film down again and
store it in the tank for later use if you want.  Keeps it dry.

> 4) When someone mentions "outgassing" what do you mean?

The film is oozing water in the form of vapor.  This drying process is the
primary action of the hypering process other then the strange stuff hydrogen
does.

> 5) I am very interested in hearing the exact procedures that you use. I
> think some mentioned letting the film sit in a heated ( or unheated ?)
> chamber for some time before introducing the final gas.

For my color film I pump down the tank, fil it with gas and then bring it to
temp.  At that time I begin the timing.  It's that simple.  The one thing I
can guarantee is that your system will perform slightly differently than
mine or everyone elses and you just have to ecperiment.

Jim


>   Once again thank you in advance for your advice, Gerry
>
>
>
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