Re: sripes on HIE with Bronica

[Nate Keith <nkeith@xxxxxxxxxxxxxxxxxxxxxx>]

Are you sure it is not an issue of agitation during development?  I ran into the
same problem with my new Mamiya back and immediately blamed the back (since I
had never had the problem before with my Nikon).  However, after posting to the
group, someone mentioned that it may be a result of circulation around the
sprocket holes during development.  I started being a little more careful and
only invert once during 30 seconds now (after the initial 30 seconds) and have
not had the problem return.

Nate


Benjamin Loo wrote:

> 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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