Reddit reviews CMS Magnetics 4" x 6" Green Magnetic Viewing Film, See Magnetic Field with This Magic Film to Learn Magnetism. Applicable for All Kinds of Magnets Including Neodymium Magnets, Lots of Fun!

I found some for $9 on Amazon This would have been cool to see in science class.

Ten bucks and you can have one too! Magnetic Viewing Film

https://www.amazon.com/gp/product/B000UV6ZPS/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=m0494a-20&linkId=854952cfbd8f0399f224d4eaced910b9&language=en_US

Copied from the YouTube video

You can, in a 2D-plane.

https://www.amazon.com/CMS-Magnetics-Green-Magnetic-Viewing/dp/B000UV6ZPS/ref=pd_bxgy_328_img_2?_encoding=UTF8&psc=1&refRID=GCJD3XAJ6ZZP502H7QW9

Found

CMS Magnetics® 4" x 6" Green Magnetic Field Viewing Film on Amazon UK

$9 https://www.amazon.com/CMS-Magnetics-Green-Magnetic-Viewing/dp/B000UV6ZPS/

I bought some a while back to use with motors
CMS MAGNETICS 4" x 6" Green Magnetic Viewing Film, See Magnetic Field with this Magic Film to Learn Magnetism. Applicable for All Kinds of Magnets Including Neodymium Magnets, Lots of Fun! https://www.amazon.com/dp/B000UV6ZPS/ref=cm_sw_r_cp_apa_i_bD2yCbYNJ2P6P

This isn't X-Rays, it's magnetic viewing film. You can buy it on amazon for around $10 here

I checked the obvious solution not really expecting success, but there it is!

CMS Magnetics 4" x 6" Green Magnetic Field Viewing Film

it was less than $10 and totally worth it.

Here's. The link for anyone https://www.amazon.com/gp/product/B000UV6ZPS/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=m0494a-20&linkId=854952cfbd8f0399f224d4eaced910b9&language=en_US

So, interestingly, you can actually see magnetic fields in THREE dimensions. Yeah, 3d. How so? They're called ferrocells. Here's an imgur album http://imgur.com/gallery/xQRYH

I can actually explain how this happens, too. It's called "Field incommensurability." Take a north and south pole of a magnet, they're "located" there right? Nope, if you could split the magnet in half there would be TWO north and TWO south poles on each side of the magnet. Split it again, there will be a north and south pole on each piece, every single time. This is an example of field incommensurability.

Now, when you take that magnetic viewing film and place two magnets side by side you'll see the white plane self-center itself around the two magnets.

What's actually happening is that when a magnet reaches another magnet and comes in contact, it becomes ONE entity - one magnet. So at that end with the singular one it's actually going to a new "end" of the magnet, as the entirety of the magnet becomes one big, long magnet.

Field incommensurability is where fields are non-point-specific, and are not LOCATED at somewhere, they are FORCED there, or are a pressure mediation to that spot. Think of it like water flowing down a hill, it's forced to be at that location.

https://smile.amazon.com/Magnetics-Green-Magnetic-Field-Viewing/dp/B000UV6ZPS

I have some, it's pretty cool!

Magnetic Viewing Film

It's also not that expensive.

https://www.amazon.com/dp/B000UV6ZPS/ref=cm_sw_r_cp_apa_i_VaBYCbS1RMHNB

Link to the magnetic paper : https://www.amazon.com/Magnetics-Green-Magnetic-Field-Viewing/dp/B000UV6ZPS

That's an interesting thought... kind of curious to see what it would do. I think you'd only run into issues very close to or on top of a magnet. If it were me, I would try positioning your prints in a part of the bed with the least magnets-- they are around the edge and a few in the middle. Study the pics here or get yourself a piece of magnetic viewing film to make it easier to see where those spots are.