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There's also another type of magnetic viewing film that doesn't seem to use oil filled capsules with flakes of metal in. This is a picture I just took, it does

There's also another type of magnetic viewing film that doesn't seem to use oil filled capsules with flakes of metal in. This is a picture I just took, it doesn't really do it justice but you can get rainbow like effects from it - https://www.anfractuosity.com/files/mag2.jpg https://www.anfractuosity.com/files/mag2.jpg This is the same film with a special type of cylindrical magnet below - https://www.anfractuosity.com/files/mag1.jpg https://www.anfractuosity.com/files/mag1.jpg Edit: It seems to be this - https://en.wikipedia.org/wiki/Magnetochromism https://en.wikipedia.org/wiki/Magnetochromism it seems to use encapsulated iron oxide nanoparticles in water in a film

philsnow 3y ago
United Nuclear has those https://unitednuclear.com/magnaview-film-p-629.html https://unitednuclear.com/magnaview-film-p-629.html
- anfractuosity 3y ago
  That looks like the type with nickel flakes to me (https://en.wikipedia.org/wiki/Magnetic_field_viewing_film https://en.wikipedia.org/wiki/Magnetic_field_viewing_film), as it's not showing different colours This video https://www.youtube.com/watch?v=yfdq3oA6-4M https://www.youtube.com/watch?v=yfdq3oA6-4M shows the colours better than my photos
  - blincoln 3y ago
    > That looks like the type with nickel flakes to me I agree. It's a night and day difference versus the magnetochromic viewing film. The monochrome film doesn't reset itself after the field is removed,[1] and the contrast is not as good. I bought both types on Amazon a few years ago. The specific magnetochromic film I bought at the time disappeared from Amazon (along with its vendor) shortly thereafter, but it seems like at least one seller has the same kind of product again.[2] [1] I suppose this might be useful for some applications, but I dislike the "ghosting" effect. [2] https://www.amazon.com/CMS-MAGNETICS-Green-Magnetic-Viewing/dp/B0B5YJCMTZ?th=1 https://www.amazon.com/CMS-MAGNETICS-Green-Magnetic-Viewing/... ("Olive Film" variation specifically)
richk449 3y ago
Any idea where I could buy this? It would be really helpful for my work.
- anfractuosity 3y ago
  I'm not sure which seller I used afraid, but there's a number on aliexpress such as in the links below, it has kind of an olive colour like blincoln noted. * https://www.aliexpress.com/item/1005005510364934.html https://www.aliexpress.com/item/1005005510364934.html * https://www.aliexpress.com/item/1005004242373777.html https://www.aliexpress.com/item/1005004242373777.html The colour apparently relates to the field strength too

philsnow 3y ago

United Nuclear has those https://unitednuclear.com/magnaview-film-p-629.html https://unitednuclear.com/magnaview-film-p-629.html

anfractuosity 3y ago
That looks like the type with nickel flakes to me (https://en.wikipedia.org/wiki/Magnetic_field_viewing_film https://en.wikipedia.org/wiki/Magnetic_field_viewing_film), as it's not showing different colours This video https://www.youtube.com/watch?v=yfdq3oA6-4M https://www.youtube.com/watch?v=yfdq3oA6-4M shows the colours better than my photos
- blincoln 3y ago
  > That looks like the type with nickel flakes to me I agree. It's a night and day difference versus the magnetochromic viewing film. The monochrome film doesn't reset itself after the field is removed,[1] and the contrast is not as good. I bought both types on Amazon a few years ago. The specific magnetochromic film I bought at the time disappeared from Amazon (along with its vendor) shortly thereafter, but it seems like at least one seller has the same kind of product again.[2] [1] I suppose this might be useful for some applications, but I dislike the "ghosting" effect. [2] https://www.amazon.com/CMS-MAGNETICS-Green-Magnetic-Viewing/dp/B0B5YJCMTZ?th=1 https://www.amazon.com/CMS-MAGNETICS-Green-Magnetic-Viewing/... ("Olive Film" variation specifically)

richk449 3y ago

Any idea where I could buy this? It would be really helpful for my work.

anfractuosity 3y ago
I'm not sure which seller I used afraid, but there's a number on aliexpress such as in the links below, it has kind of an olive colour like blincoln noted. * https://www.aliexpress.com/item/1005005510364934.html https://www.aliexpress.com/item/1005005510364934.html * https://www.aliexpress.com/item/1005004242373777.html https://www.aliexpress.com/item/1005004242373777.html The colour apparently relates to the field strength too