Re: Pressure plate static?

[HypoBob <hypobob@xxxxxxxxxxx>]

> Kieth,

Heeger, MacDiarmid, and Shirakawa just won the Nobel prize in chemistry for solving
this problem for us.

Well, not exactly, but their development of conductive plastics has led to a coating
incorporated in photographic film to prevent static electricity from becoming part
of our images.  I have never seen this promoted or claimed by any of the big film
makers, so maybe it is only used in expensive, special purpose films.  On the other
hand, I have often wondered how all these motorized cameras manage to rewind film so
fast without any static electricity marks.  Possibly this Nobel-quality discovery
explains it.

Anyway I, like you, would be cautious and use the film-backing-paper approach until
I know for certain that IR films incorporate anti-static polymers.

Bob

> Keith Zimmerman wrote:
>
> ------------------------------
>
> Date: Wed, 11 Oct 2000 22:27:26 CDT
> From: "Keith Zimmerman" <zz_ir@xxxxxxxxxxx>
> Subject: Pressure plate static?
>
> >From: Clive Warren <cocam@xxxxxxxxxxxxxxx>
> >
> >The simple expedient of wrapping 120 backing paper around the
> >pressure plate, black side towards the lens, will stop the problem.
> >Some people advocate the use of black self adhesive plastic as a
> >longer term solution.
>
> Hello to all.
>
> I'm no expert in this field, but it seems to me that the plastic-covered
> pressure plate and the moving film base could create some static problems
> that could be evident on the film.  I don't know the width of the gap
> between the film path and the plastic-covered pressure plate, it seems as
> though the potential for this effect would be present.
>
> Is there anyone out there that could add any info on this subject?
>
> Keith Zimmerman
> zz_ir@xxxxxxxxxxx
> http://homepage.dave-world.net/~vkzimm/infrared.html
>
> ______

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