X-Ray Fogging

[robert_parker]

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Hello Everyone

 

I'd be grateful for comments on what I'm looking at here.

 

The film concerned is Kodak Professional 400 and the effect is also somewhat visible on a roll of Portra NC

 

The films have gone through an X-Ray scanner on an outward and return journey.

 

In each case the films were in their plastic containers and in the top of a suitcase, which was scanned with hand baggage.

 

I'm taking it to be X-Ray fogging, the damage is most obviously visible at the beginning and end of each roll - some frames in the middle are virtually unaffected.

 

Both taken last Sunday, lllf Red Dial, 35mm Summicron

 

A clear shot from the centre of the roll is here http://www.leica-camera-user.com/people/20627-artist.html

 

[ATTACH]31989[/ATTACH]

 

[ATTACH]31988[/ATTACH]

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[IIIf]

Robert,

If I understand you corectly, what you describe would not be x-ray related. You indicated that the marks were at the begining and end of the roll, not in the middle. Further If I interpret the two shots correctly, you have horizontal lines running the length of the film at each end of the roll. X-rays would tend to affect the most exposed portions of the film as it was rolled within the camera. Picture the film as it sits within the camera (how many shots taken at the point of exposure?) It is rolled at one end within the film cassette and at the other on the advancing spindle. The outside sections of the film, including the section sitting ready for exposure by the shutter curtens would suffer the worst of the x-ray damage (depending on thicknesses of camera parts and whatever was around the camera). Unless you were faced with two exposures to x-rays (first at the start of the roll and second as you neared the end of the roll, I would look to another explaination of the damage. Given that the lines run along the film, I would look to something in processing (assuming automated machine). It is necessary to see the negative roll in its entirety to further diagnose such a problem with a reasonable accuracy (single pictures reaely show enough to understand what happened).

Good Luck, PJH

[charlesphoto99]

Looks like processing. In the years of flying as a pro I've never had problems with walk on x-rays even with films up to 3200; my girlfriend packed her film once in her luggage and it had notable fogging/color shift afterwards but it happened overall. Go talk to your "lab."

[rob_x2004]

No maligning Rontgen here.

[erl]

Robert,

 

I second the processing problem as the source. Not only does it look like roller marks, but the second image displays indications of uneven development with the denser strip down the middle.

 

Back to the lab. They may have had other complaints with the same problem. If they are prepared to disclose that, it may help them with their QC in the future.