What is sheet magnet?
Sheet magnet is a rubber or plastic sheet that contains millions of microscopic iron particles that have been magnetized by an electro-magnetic field. Once magnetized, these iron particles hold their magnetic charge permanently. There are many different kinds of magnetic fields that can be set up in sheet magnet to perform different jobs, but the most popular are the type of sheet magnets used to make advertisement items that are cheap enough to give away and will hold their own weight on the kitchen fridge indefinitely. Sheet magnet is most often available in two styles. One has a self-adhesive on the front, which can be used to stick it on the back of a flat object like a business card to hold the card on a steel surface. The second is made with a thin layer of white or colored vinyl on the non-magnetic side. This type of magnet sheet can be used to silk-screen messages or art on. Again, this is very useful for advertising give-aways.
