Surface-Area and Magnet Strength

- Jul 07, 2019-

Due to their small size and strong holding force, most people believe that neodymium magnets are the best option when a magnet is required; however, this isn’t always the case.

For example, when using magnetic paint as a receptive base, a magnetic sheet is actually more suitable.

Because the ferrous material is spread thinly throughout the paint, the smaller surface area of the neodymium magnets is a disadvantage as it has less to hold onto. Additionally, the neodymium magnet’s weight works against it.

A sheet of magnetic material has a larger surface area and so is able to find and grip onto more of the ferrous material than a smaller, but more powerful neodymium magnet.