HELP! Very Strange Black Lines

[jianglinxi]

Hello everybody,

I took some 4x5 photos in summer. I find one or two very strange line(s) on some frames.

I use tray processing to develop 4x5 negative. Beside long edge, I can see one or two bright lines (blurred) on some negatives. After I make contact printing, it shows dark blurred line on some frames. I really have no idea what is the cause of blurred strange line.

I didn't try to enlarge these frames, but I think black line(s) can be seen on large prints (11x14").

I really don't want this line(s) shows in my future frames. Please help me.

Please look at the following reference photo. I use red squares to show location of strange lines.

Thx

[Vaughn]

Test your camera for light leaks.

[consummate_fritterer]

Light leaks would be lighter (in the print) than the rest of the image. That appears to be either a processing problem or a film manufacturing flaw.

I can only speculate that the developer tray has raised ridges and those may be decreasing development if the film was developed emulsion side down, creating those darker lines.

I suggest you place the film in the cleaned developer tray and look for where the lines (lighter in the negs) align in the tray.

[jianglinxi]

Thank you! If camera has light leaks, the line should be lighter.

[jianglinxi]

Light leaks would be lighter (in the print) than the rest of the image. That appears to be either a processing problem or a film manufacturing flaw.

I can only speculate that the developer tray has raised ridges and those may be decreasing development if the film was developed emulsion side down, creating those darker lines.

I suggest you place the film in the cleaned developer tray and look for where the lines (lighter in the negs) align in the tray.

Thank you! The film was developed emulsion side up. The developer tray is the current version which is made by Paterson.

[Vaughn]

But in both images, the rebate appears to be lighter in the areas of the darker 'lines'.

[consummate_fritterer]

Vaugn, I think you're seeing glare reflected off the surface of the contact prints.

[consummate_fritterer]

Jianglinxi, is it possible that the film was accidentally developed emulsion side down?

[jianglinxi]

Jianglinxi, is it possible that the film was accidentally developed emulsion side down?

I'm 100% sure the film was developed emulsion side up.

[dasBlute]

could be not enough randomness in your agitation