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

[KGKIRKLEY@aol.com]

In a message dated 4/4/02 10:01:21 PM, swalters@att.net writes:

>I have found little crescents here and there on some developed hypered
>120
>
>format Tech Pan film that I think are caused by electrostatic discharge
>
>(ESD) when I remove the paper backing.
>
>
>
>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?
>
>
>
>Here are some aspects of the problem I have:
>
>
>
>- I must leave the paper backing on when hypering or I get uneven hypering
>
>of the film. I think this is pretty common knowledge and I have definitely
>
>demonstrated it by trying. I get "bands" on the film.
>
>
>
>- I must remove the paper before using the film because I have a vacuum
>
>camera back that would be defeated if the paper was left on.
>
>
>
>- After hypering, the film and paper are highly dessicated (dry) which
>makes
>
>ESD more likely. It's like pulling socks apart after they come out of a
>
>dryer. Zapppp....
>
>
>
>Any suggestions?
>
>
>
>Thanks!
>
>
>
>Steve...

Steve:
Others have already given you advice but if you are seeing "little crescents" 
on your 120 film, the source is not static discharge but physical damage. 
I've shot and processed hundreds of rolls of 120 film (including hypered Tech 
Pan) and the biggest problem is handling the film so you don't ever 'crimp' 
it or bend it sharply at a given point. Doing so results in what is usually 
called 'moons'.

The less you have to handle film the better and this goes for hypering too.
The best way to hyper 120 film is to load it on a processing reel, without 
the backing as this ensures even dessication and hypering, but it increases 
the possibility of physical damage. The next best way is to unroll the film 
loosely from the backing, but leave the backing attached at the tape point. 
After hypering, re-roll the backing.

Kent Kirkley

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