Re: sripes on HIE with Bronica

["Benjamin Loo" <bennkloo@xxxxxxxxxxxxxxxxxxxx>]

Cameron

I did encountered same problem with my Bronica 35mm wide back when using
Kodak HIE. and post a message on May 06, 1998. And till now I still can't
figure out what's the cause.

But I like to tell list members this: those stripes are vertical in
landscape, that is they run from sprockets on one side of the film to the
other at about the same frquency as the sprockets so one frame, approx. 25mm
by 56mm would have about 11 stripes which only appear inside the image area.
On negative it is lighter stripes, on prints it show darker stripes and
gradually fade off toward the centre of the picture. I put a black sticker
on pressure plate but still having problem.

I don't think this is a light leak from the dark slide slot, because those
stripes are to uniform on the negatives. As for could they be mechanical
stress marks, how can we prove this?


>Thanks for your reply, the stripes are vertical in landscape, that is they
run from
>sprockets on one side of the film to the other at about the same frquency
as the
>sprockets, so one frame, approx 25mm by 56mm would have about 11 stripes.
>Looking at the negatives it is difficult to judge  but they appear to be
possibly
>lighter density stripes about 3mm to 1mm  wide on the negative which is
very
>strange. You can see the picture through the stripes so maybe they are
wider
>darker sripes and the lighter areas are the gaps between them. I plan to
expose a
>roll of HIE with a lightproof bag taped over the whole of the camera back,
to test for
>light leaks. If not then could they be mechanical stress marks caused by
the very
>small radius at one point in the film path of the Bronica 135wide back?
>Cameron.
>
>
>On Mon, 15 Jun 1998 07:54:00 +0000 Don Roberts wrote:
>
>
>> Cameron, while I can't identify the cause of your stripes now I can say
that it is
>not
>> from dark slide slot as that would give you streaks parallel to the film
which runs
>> horizontally.  I also use that camera and back as well as a 70mm back for
IR and have
>> not encountered the problem yet.  You don't say whether the stripes are
black on the
>> neg as a light leak would be or light which  would indicate a different
type of
>> problem.  Are they thin, thick or uneven?   Are they visible as a scratch
would be?
>> Tell us more and maybe we can help.



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