Lines on the side of the holder flap.

[gmed]

I occasionally get a line on the film on the end of the side that corresponds to the film holder feeding latch. The film holders are in pretty new condition, no leaks. It is also 0.5" into the photo so I dont think its the holder, I dont get anything on color films. Also, this never occurs when I use the BTZS tubes. I have a feeling this has to do with the Jobo tank, which I only load 4 at a time, leaving one bland in the middle. I use a roller, but the side of the lid ends up being lifted a little as it is uneven.
the line is perfectly linear, as you can see on the image. I can also see a faint line on the film itself. Not sure where this is coming from.

any idea would be greatly appreciated as this results in a big crop which Im trying to avoid

[Sandro]

It seems to me this has to do with light or development, probably the first.
Are there any not-black area inside the camera.

[gmed]

It seems to me this has to do with light or development, probably the first.
Are there any not-black area inside the camera.

it doesnt happen all the time. only with BW, which i develop at home. not very consistent. I mainly saw it on the last batch

[Doremus Scudder]

You may be getting some internal reflections from the edge of the filmholder flap. Try sanding it with very fine sandpaper to take the sheen off and see if that helps. Ive done this with most of my holders.

Best,

Doremus

[devb]

When I had that happen a few years ago, I found pinhole light leaks in the tape that acts as the flap hinge. I replaced the tape with black gaffer tape (the real stuff that costs $20 a roll) and it hasn't recurred since.

[gmed]

Just from the placement of the line relative to the tape, not sure how this could be due to a light leakage. It's not near the tape and it's a straight line

[Doremus Scudder]

When I had that happen a few years ago, I found pinhole light leaks in the tape that acts as the flap hinge. I replaced the tape with black gaffer tape (the real stuff that costs $20 a roll) and it hasn't recurred since.

The loading flaps only need the tape hinge to hold them on the holder; when the flap is closed, there should be no light leaks whether there is tape there or not. The flap itself should block all light.

Doremus

[nbagno]

I get the same exact line on some of my negatives and in the same location. Trying to limit the number of holders to see if I can narrow it down.


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[stawastawa]

something to do with how your film sits in the film holders for developing? something to do with the agitation method?

[nbagno]

something to do with how your film sits in the film holders for developing? something to do with the agitation method?

I’m using a jobo expert drum, can’t see how it could create a line like this.


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