Look at the difference between these films - CT scanner exposure

[cerber0s]

Can you see the difference in density?

Both are cut from the same 100ft roll of bulk film, and both were developed together in the same tank for six minutes with normal agitation. Can you guess the difference between them?

 

[djdister]

The top one you either intentionally fogged, or it went through an x-ray scan multiple times...

 

[cerber0s]

The top one you either intentionally fogged, or it went through an x-ray scan multiple times...

Correct! Twice through an airport scanner.

 

[Nitroplait]

Must have been CT scanner then. Regular X-ray don’t do that in my experience.

 

[BrianShaw]

Must have been CT scanner then. Regular X-ray don’t do that in my experience.

… as quickly. Maybe after 20 passes…

 

[cerber0s]

Must have been CT scanner then. Regular X-ray don’t do that in my experience.

Yes, one of the two scanners was a CT scanner.

 

[ic-racer]

Thank you for showing this.

 

[koraks]

That's pretty rough indeed.

 

[Paul Howell]

This is why I have stopped traveling with film, too complicated, make sure no film in camera, hope that the custom or security person will hand check etc. I will either buy film once I get there, have in developed prior to departure or mail it home and hope the shipping company is not using a CT scanner or just use digital. ,

 

[AZD]

I tried this as an experiment once (HP5 also) but with a longer strip. Besides the fog level there were also darker patterns, so it would effectively ruin any images rather than just add density.

 

[cerber0s]

I tried this as an experiment once (HP5 also) but with a longer strip. Besides the fog level there were also darker patterns, so it would effectively ruin any images rather than just add density.

Yes, the photos were mostly ruined

 

[Samu]

Yes, one of the two scanners was a CT scanner.

I have had different experiences with the new CT scanners at airports. In most cases, films are undamaged, but with a bad luck, they can be totally destroyed. One weird experience was having about 10 rolls of film scanned, HP5, FP4. Portra 160. amd Portra 400. All the other films were visually fine, except for one roll of Portra 160, which had uneven fog marks in almost every frame. I have to use airports where requests for hand check are almost always denied.

 

[Agulliver]

Thanks for doing this experiment for us. It demonstrates that CT scanners can do real damage, though I am equally sure people sometimes get lucky.

Thankfully we're now getting a lot of data from real life situations where people are able to get film hand inspected at airports around the world. This certainly won't stop me travelling with film.

 

[cerber0s]

Thanks for doing this experiment for us. It demonstrates that CT scanners can do real damage, though I am equally sure people sometimes get lucky.

Thankfully we're now getting a lot of data from real life situations where people are able to get film hand inspected at airports around the world. This certainly won't stop me travelling with film.

It kind of depends what you mean by salvageable. You could make out what they were. A few that had an abundance of light came out OK. I've scanned them, but they were bad enough that I just dumped the negatives in the trash.

 

[cerber0s]

I also shot a few rolls of Adox CMS 20, those came out just fine.

 

[Loren Sattler]

Please explain what a CT scanner is?

 

[djdister]

Please explain what a CT scanner is?

From a Google search:

CT scan - Mayo Clinic

www.mayoclinic.org

and as applied at airports:

Computed Tomography | Transportation Security Administration

The TSA Computed Tomography (CT) Scanning page explains how CT technology enhances security screening at airport checkpoints.

www.tsa.gov

 

[MattKing]

@cerber0s ,
For purposes of helping people find this thread if they are researching the subject of CT scanner effect on film, we would like to add a reference to CT scanner exposure to the thread title.
Your thoughts?

 

[cerber0s]

@cerber0s ,
For purposes of helping people find this thread if they are researching the subject of CT scanner effect on film, we would like to add a reference to CT scanner exposure to the thread title.
Your thoughts?

Absolutely!

 

[MattKing]

Absolutely!

Done!

 

[Arthurwg]

This is why I have stopped traveling with film, too complicated, make sure no film in camera, hope that the custom or security person will hand check etc. I will either buy film once I get there, have in developed prior to departure or mail it home and hope the shipping company is not using a CT scanner or just use digital. ,

For sure the best solution.