Re: faint lines on negatives

[Goff Photo <jdgoff@xxxxxxxx>]

At 07:53 PM 5/20/97 +0200, you wrote:
>Subject: faint lines on negatives
>
>Hi, all
>
>Let me for your convenience summarize all your valuable remarks about
>the mistery of the faint light horizontal line on IR negatives. It's one
>line over the whole length of the film.
>
>Some of you blame the shutter of my Nikon F801 camera (similar to 8008?)
>(Roger Hein) As the line is light, it is not possible that there is any
>leakage. This should show up as black on the negative. A leakage from
>the film ID window is therefore also excluded. (Seth Mayer)
>
>I also exclude the possibility of aperture spots and optical failures.(
>Peter Ray) The line runs over the whole film about 20% from the top and
>is very persistent. I used different lenses/focal lengths. 
>
>There is no such lines on other Non IR negatives. I checked all my
>negatives carefully on this phenomena.(Peter Badcock). As far as IR is
>concerned: this was my first IR HIE film experience!
>
>Remains the remark of static electricity caused by quick electric
>rewinding (Pete Damip) and the possibility of too excessive agitation
>(Bob Long)
>
>Roger, Seth, Peter1, Peter2, Pete and Bob thank you very much for your
>stimulating reactions! I will proceed to my second HIE coming days. I
>will use same camera again and wait what happens! On your advice I will
>apply gentle agitation. I will also take XTOL 1+1 (not stock solution as
>before) and of course adjust the development time. Moreover I will seal
>off the film ID window, although I don't think this is the problemmaker.
>If this second film shows the same lines, I will try my old Nikon
>Nikkormat EL. She has no electric rewind, no ID window, an older type of
>shutter (off course) vertical run. You see, I'm a Nikon fan!!
>Considering all your reactions I'm beginning to believe, that static
>electricity could be the cause. That explains the fact, that in your
>experiences these lines do not appear all the times i.e. may be not
>during higher humidity??
>
>If anyone else has some other advice, please let me know.
> 
>I will keep you informed! I must say I learn a lot. Thanks heaven, that
>WJ started this group! See you!
>
>Jaap Los
>Holland
>*I don't say that static is not the cause, only that my experience with
static marks has been they appear as random, lightning-like marks. I never
have seen any static marks that appear even and consistant. Consider, for
example, how a static mark could join itself, frame-by-frame, in exactly the
same place; particularly when he whole roll of film was (probably) not
exposed at the same time. Without seeing the marks, it is difficult for me
to comment meaningfully about probable cause. I dislike being negative here,
but looking for static as the cause may be unproductive. In my use of 35mm
HIE film in my Nikon 8008 with data back and Nikon 6006, I have not
experienced the line as have so many others. I do use both a zoom and a
variety of fixed focal length lenses. I process in a JOBO processor, using
Kodak D-76 developer, indicator stop bath and Kodak fixer. Formerly, I used
Patterson tanks with same chemistry--with no observed lines. Just this
morning, I pulled some HIE negs from my file to see if the lines were there
and I had not attended to them. Of the four rolls I examined, not one had
the line. Finally, it may not be outside the realm of possibility that there
is a manufacturing/packaging failure. Such are not unknown, albeit rare.
(Leak in the cassette??) Sorry I could not be more useful, but I thought
that any additional information might add to the investigation, however
remote it might be.  Good Luck......James in SW Colorado, USA
>****
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End of Infrared-Digest V0 #23
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