Re: [APML] TechPan Hypering with high vacuum

[Jason Ware <jtw@galaxyphoto.com>]

The sort answer is, you  can't. The current 
stock of 120 tech pan will show problems
with or without the backing becuase the ink
bleeds into the flim while in storage even
before it gets to you. You may be able to
use low vac and hyper for several days but
you will not get a very "fast" film.

I endend up buying a couple of boxes of 4x5
sheet film that I cut down to 6x7.

* wrote:
> 
> I'm sure this is an old can of worms but... Where are
> the best links for "personal best techniques" for
> hypering Techpan in 120? I have a Lumicon 600 setup
> with both temp probes and a high vacuum pump. I've
> heard that the later emulsion can be hypered in the
> paper backing without the Kodak Nebula problem. If
> possible I would like to remove the backing after
> hypering for use with a vacuum back camera. My main
> interest is with the use of the high vacuum pump and
> how many cycles are needed to dry the film before
> hypering? I've also heard Nitrogen instead of forming
> gas can be used for the prehyper vacuum treatment?
> 
> Keith
> 
> 
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 -Jason Ware 

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