{"product_id":"magnetic-viewing-film-6-inch-x-3-inch-magnetic-field-display","title":"Magnetic Viewing Film 6 inch x 3 inch - Magnetic Field Display","description":"\u003ch1 class=\"firstHeading\"\u003e\u003cfont size=\"5\" color=\"#0000ff\"\u003eMagnetic field viewing film...COOL!!!\u003c\/font\u003e\u003c\/h1\u003e 6 inch x 3 inch rectangular film \u003ch3 id=\"siteSub\"\u003eFrom Wikipedia, the free encyclopedia\u003c\/h3\u003e \u003c!-- start content --\u003e \u003cp\u003e\u003cstrong\u003eMagnetic field display viewing film\u003c\/strong\u003e is used to visualize magnetic fields. It is a translucent \u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Paper\" title=\"Paper\"\u003epaper\u003c\/a\u003e-like substance which makes \u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Magnetic_fields\" title=\"Magnetic fields\"\u003emagnetic fields\u003c\/a\u003e visible. Most are made from a plastic \u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Film\" title=\"Film\"\u003efilm\u003c\/a\u003e that contains a \u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Ferromagnetic\" title=\"Ferromagnetic\"\u003eferromagnetic\u003c\/a\u003e slurry of fine \u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Nickel\" title=\"Nickel\"\u003enickel\u003c\/a\u003e particles that align themselves along magnetic field lines.\u003c\/p\u003e \u003cp\u003eSome varieties appear brighter green, while others turn darker black, when in the presence of perpendicular field lines. This enables visualization of the field strength and behavior.\u003c\/p\u003e \u003cp\u003eThe general principle of operation is that magnetizable \u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Nickel\" title=\"Nickel\"\u003enickel\u003c\/a\u003e particles are suspended in a \u003ca href=\"http:\/\/en.wikipedia.org\/wiki\/Colloid\" title=\"Colloid\"\u003ecolloidal\u003c\/a\u003e form in a gelatinous material. This allows enough freedom for the particles to align with an externally applied magnetic field - thereby displacing the colored fluid and causing a color change at the surface of the film.\u003c\/p\u003e","brand":"Neodymium Magnets Store","offers":[{"title":"Default Title","offer_id":52545910604090,"sku":"MFDF6X3","price":7.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/9495\/7370\/files\/film3__79954.1604618601.1280.1280.jpg?v=1767132625","url":"https:\/\/supermagnetstore.com\/products\/magnetic-viewing-film-6-inch-x-3-inch-magnetic-field-display","provider":"Super Magnet Store","version":"1.0","type":"link"}