What Are Magnetic Stripes?

 

Magnetic stripe technology has been around for 40+ years, and more magnetic stripe cards are produced today than ever before. However, there is still widespread misunderstanding about magnetic stripes and their role in bank and gift card transactions.

Magnetic stripes are thin layers of ferrous oxide applied to the surface of the card. Each oxide particle has a magnetic north and magnetic south pole. When first applied to the surface of the card, the arrangement of these particles is totally random, the stripe is magnetically neutral and is said to be “un-encoded” or blank. To add information to the magnetic stripe, the oxide particles are forced to align with their magnetic poles in the same direction. By periodically reversing the direction of the alignment this “encoding” creates a pattern of transitions between north south magnetic fields. It is these transitions that are read and interpreted as data.

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Plastic Card Solutions: A Guide to Quality

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