CMS MAGNETICS - 12x12 Green Magnetic Flux Viewing Film for Revealing Hidden Magnetic Field Patterns in Permanent Magnets for Science Projects, Research and STEM Education in Magnetism

This magnetic viewing film is awesome for visualizing magnetic fields clear, responsive, and perfect for science demos or teaching. Great size and fun for kids and adults alike. A cool addition to any STEM kit.

My husband loved it

These sheets are very sensitive, although you do need to use them in a well-lit environment, as the images are inherently pretty dark. Also the film will leave ghost images behind indefinitely after you remove the magnet, so you might want to periodically degauss it by wiping it with a large refrigerator magnet that can hit the entire film in one pass. Sort of like erasing one of those old Magna Doodles.While it's certainly fun to just look at magnets, especially some of the complex ones that use alternating magnetic poles to have magnets that "turn off" by twisting 180 degrees so the magnetic fields cancel, etc. It's also handy for precisely locating magnets that are embedded inside objects, like the magnet in my laptop that holds the lid shut, or pinpointing exactly where the magnets are on cabinet doors so I know where to put a pad of felt to muffle the slam, etc.

I saw this film on a YouTube video. It showed where all the magnets are in the iPad. I got it because I’m curious and had to see it in person. For the low price it’s well worth it. I’m not sure what else it could be used for but I’m sure there’s something. I did send this to the grandkids and they had fun with it too.For the cost of a kids meal it’s fun to get and try out.

Now that i got your attention, this green magnetic field picker upper is a fun toy for the kids when they are playing with magnets. Good for seeing the patterns of magnetic fields, and easy to wipe the pattern off the paper with another magnet. Not sure about finding hidden alien devices, but you never know.

Just don't expect any dramatic lines of force extending away from the magnet. What you'll get is gradations of darkness in the immediate vicinity of the magnet.

I work in IT and I used to use a larger version of this same type of product but need something smaller. This is incredibly helpful in locating speakers or magnets that assist in putting devices to sleep or lock displays. Sometimes when you are blindly tearing down devices you may have to separate screen from enclosures and it can be helpful to know what is around the area you are prying at.

Can barely see anything, even with fairly strong magnets. Maybe this is the limit of this tech but probably better to just get a little clear plastic box filled with iron filings or something.