Re: [APML] Electro-Static Discharge and hypered 120 format Tech Pan

["Andrew Schott" <aschott@cfl.rr.com>]

When handling any film, think of it in terms of the first inch and the last
inch.  Those are the only points of the film you should actually touch as
they are usually discarded.  Touching the film along it's length causes
problems and it's not the best habit to get into.  Not so much in terms of
the bends and crinkles like you've been experiencing, but also from the
chemical standpoint too.  Skin oils, chemicals tracked onto the film by
touching it, and damage to the delicate emulsion are all to be avoided if
you want to keep defects out of your hard work.  Even the use of gloves can
cause problems as they tend to track chemicals and contaminants onto the
film too.

Patterson tanks should work fine with most 120 films.  As well as can be
expected with this most difficult to handle format.   TP is thin but not so
thin that it can't be handled.  The reels must be DRY.  As dry as possible
when you attempt to load.  A small amount of moisture, even dampness will
cause the film to stick to the reel and prevent proper loading.  The
clutches will then place too much pressure on the film as they attempt to
load it and you're back to the crinkle problem again.  Sometimes it helps to
load the film after it's been refrigerated, or in a very cold darkroom.  The
cold helps stiffen the weak plastic base and helps dry the plastic reel a
little more so the film will cooperate better.

Moisture is usually only a problem when you're processing more than one roll
in a run.  If your reels and tanks have been drying for a day or more, you
probably won't have any problem.


----- Original Message -----
From: <swalters@att.net>
To: <astro-photo@seds.org>
Sent: Friday, April 05, 2002 10:31 AM
Subject: Re: [APML] Electro-Static Discharge and hypered 120 format Tech Pan


> Ok, I guess I am crimping the film. I just don't have
> enough experience with 120 format yet. I've been doing
> 35 mm on stainless reels for a long time, no problem
> there, but I've only done a few 120 format rolls so far.
> I know to be careful but this TP is sure thin stuff.
>
> I guess I should be happy as this is probably more
> easily solved than some mysterious ESD problem.
>
> Would a Patterson self threading tank/reel take care of
> this crimping problem? Will the Patterson work ok with
> this thin TP film?
>
> Thanks to all who responded!
>
> Steve...
>
> --
> http://Astrophoto.home.att.net
>
> >
> >
> > "Steve..." wrote:
> > >
> > > So, my question is this: Of those who are hypering 120 format Tech Pan
and
> > > then removing the paper, what are you doing to avoid ESD?
> >
> > This seems to be less of a problem with the new backing
> > Kodak is using. If you are seeing crescents they are most
> > likely crimp marks.
> >
> > --
> >  -Jason Ware
> >
> >  ---------------------------------------------------------
> >        VISIT MY ASTROPHOTOGRAPHY HOMEPAGE!!
> >     ASTRO IMAGES FOR DOWN-LOAD, TIPS, REPRINTS
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> >  ---------------------------------------------------------
> >        My Other Hobby....High Power Rocketry
> >       URL: http://www.galaxyphoto.com/rockets
> >
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