vertical lines on 120 negative

Markovevna · May 11, 2020

Hi I'm new here, I just bought a Mamiya 645 and I've tried an expired (2000) B&W film and I've send it at the Lab for developing and when I received it there were multiple lines on all my shots. Does someone knows what can cause this? Thanks!

Donald Qualls · May 11, 2020

Scan artifacts. You need to talk to your lab, they owe you a rescan.

MattKing · May 11, 2020

Welcome to Photrio.
Donald is probably right, but just in case, can you see the lines in the negative itself when you use a magnifier?

ic-racer · May 11, 2020

Are the lines on the emulsion side or the base side?

koraks · May 12, 2020

Donald Qualls said:
Scan artifacts. You need to talk to your lab, they owe you a rescan.

Could very well be the cause; it's also possible that they are scratches in the emulsion itself, originating either in the camera (e.g. due to dirt or minor damage to internal components) or in the processing machinery.
Given that the lines show up as black on the positive images, it's highly unlikely that they are scratches on the base side of the film. Those would usually show up as white on scans or prints.

Sirius Glass · May 12, 2020

Please post a photograph of the negatives.

Donald Qualls · May 12, 2020

koraks said:
Could very well be the cause; it's also possible that they are scratches in the emulsion itself, originating either in the camera (e.g. due to dirt or minor damage to internal components) or in the processing machinery.
Given that the lines show up as black on the positive images, it's highly unlikely that they are scratches on the base side of the film. Those would usually show up as white on scans or prints.

IMO, they're too even over multiple frames to be scratches; if they were, they'd be on the emulsion side, but I'd expect to see some side-to-side wander. Also, it'd be hard to make scratches that fine from camera damage, and scratches due to dirt are never that straight in my experience.

koraks · May 12, 2020

Yes, I agree. It all looks suspiciously sharply defined. I'm leaning towarda a scanning issue as well. Fortunately, a quick look at the negatives will give a good clue.

vertical lines on 120 negative

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