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mysterious lines in print
Has anyone else ever come across this strange phenomenon of parallel lines throughout a print? I've recently seen this in a friends finished print, they are very obvious in consistent tone areas (skies).
They are about 1/4 inch apart. I'm guessing it's defective paper.
I don't know what type of paper it was.
david
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What does the negative look like?
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I don't have the opportunity to look at the negative at this time, but I have seen prints made from the same negative before and they do not have these lines.
david
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If you see lines which travel parallel to the direction of film travel in the camera, check the pressure plate and film gate for dirt and/or burrs.
If you are using a type of film that comes in a cartridge (35mm) check the lips of the magazine for dust, dirt and burrs.
While we're on the subject, this wouldn't be a bad time to clean the whole film path of your camera... An ounce of prevention, don'cha know! 
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Randy, This print is from a large format type 55 polaroid negative. So, it's not scratch marks from the movement of the film. Plus, these are completely symmetrical lines.
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They could be pressure scratches grit /dirt in the rollers of the film holder, they would be parallel.
Ian
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It just comes to me... A good test would be printing the same negative tilted 90 degrees on a sheet from the same box of paper..
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As pointed out in an earlier post, the OP is about a print. In fact it is about more than one print from the same negative. One does not have the lines and the other one does. (Post #1 and post #3)
Something is bad in the print with lines. It could be bad paper or a stuck roller in a roller transport processor. It is hard to say, but Marco has a thought here to test if it is bad paper.
PE
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Slight scratches to negatives can occur during storage if there's grit/dirt present in the neg sleeves, in addition a slight surface scratch (non emulsion side) may show when printed with a condenser enlarger but not with a cold light source or colour (diffuser) head.
Ian
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 Originally Posted by davido
Has anyone else ever come across this strange phenomenon of parallel lines throughout a print? I've recently seen this in a friends finished print, they are very obvious in consistent tone areas (skies).
They are about 1/4 inch apart. I'm guessing it's defective paper.
I don't know what type of paper it was.
david
Originally Posted by davido
Randy, This print is from a large format type 55 polaroid negative. So, it's not scratch marks from the movement of the film. Plus, these are completely symmetrical lines.
Are you absolutely sure this friend of yours isn't making d*****l prints from scans of his type 55 negatives, instead of doing analog printing in a darkroom? It all sounds to me like those familiar problems you continuously have with clogged nozzles on d*****l printers.
Last edited by Marco B; 02-12-2011 at 12:04 PM. Click to view previous post history.
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" The nineteenth century began by believing that what was reasonable was true, and it wound up by believing that what it saw a photograph of, was true." - William M. Ivins Jr.
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