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> Cause of dark band on my film? |
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Cause of dark band on my film?
I’m assuming the image is from the full frame of a 35mm negative? If the line was on all frames, it would be in the same position, and run the full length of the roll? If so, I still think it is an issue in the film transport, possibly caused by corrosion, or damage to a roller, film guide or pressure plate. The defect would be located in the lower area of the film chamber, as the image would be upside down.
Alex Sent from my iPhone using Tapatalk Pro |
#12
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#13
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#14
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It looks painfully like a pressure mark. I get this in my Horizon panoramic sometimes. The film isn't scratched, but some unevenness in a roller applies pressure to the film as it passes through the camera. It shows in areas of clear tone (typically clear skies) so can be completely masked if that part of the frame contains texture and detail.
I'm afraid the exact cause could be very hard to find, and even harder to remedy. |
#15
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If you are confident it isn't the camera, have you found this problem with other cassettes? If not then you have to consider that the cassette was too tight on one side and causing a drag in the film.
However, I think the line is too distinctly sharp to be atributable to a cassette. |
#16
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The fact that the camera is quite new, and from a quality manufacturer makes me think that it is unlikely to be the problem. I do think, however, that it is a problem caused by the film passing over an uneven surface at some point prior to development. A pressure related mark, as Colin said. Having looked at the original post again, I see that the films were commercially processed by a lab. Perhaps trying a different lab, or processing at home would help isolate the problem?
Alex. Sent from my iPad using Tapatalk Pro |
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#18
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The alternative
Doing it yourself is probably the best way to go. B&W developing is oh so simple. If you already print your own pictures then you are already 3/4 of the way there.
You will be able to choose the developer you use to get the effect that you want, not a universal 'soup' the processing house decides it wants to use. It will be cheaper, and you will not have to wait until they get around to doing it. Have you approached the processors to get their take on the problem? I would not expect them to admit responsibility outright but it may get them thinking. I wonder if the machinery they use in the developing process is as clean as it should be. |
#19
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Yes. I emailed the lab (with the scanned image attached) and the owner replied and asked me to call him tomorrow so that we can view the image together and discuss it. I'm curious to get his take on this.
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#20
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The problem with labs developing black and white film is that yhey do not get many to develop, and sometimes the chemicals can be sitting for months, and problems can happen simply due to the lack of use, a dedicated line has to be used for standard black and white developing and sometimes maintaince can be lacking these days due to cost, if you want to get a lab to process B/W then someing like Ilfords XP films are abetter bet as they are processed though C41, better to develop your films at home, not difficult or expensive, just get a Developing tank and the film developer of your choice, if you print at home then you already have Stop and Fixer, if your darkroom is fixed then load the tank in there or get a film bag and you are away, and you get the negatives that you want
Richard
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