Most bank cards are magnetic cards, and the magnetic stripe on the back will show magnetism. If the surface of the magnetic stripe is divided into many small units, and the magnetic characteristics of each unit are controlled separately, the magnetic stripe stores information. When the bank card is close to the strong magnetic field, its original stored information is rewritten or lost, which is called degaussing. It can be seen from the above principles that the essence of degaussing magnetic stripe card is actually the change of magnetic field, so degaussing can be avoided only by avoiding strong magnetic field. What items should a bank card avoid?

After reading some materials, I found that the magnetic buckle in the wallet can not rely on the magnetic card, followed by the magnetic components such as headphones in the mobile phone, and then the magnetic stripe is worn. The material for protecting the magnetic stripe outside the bank card is generally a layer of wax, which is waterproof and wear-resistant, so the service life of the card itself is long. Of course, there are televisions, microwave ovens, induction cookers and so on. It can also cause degaussing.

At present, some backpacks, wallets and locks are buttons made of magnets, which will have a bad influence on magnetic cards. It is best not to put the magnetic card there. Do not bend the magnetic card to prevent sharp objects from wearing, scratching or twisting the magnetic stripe. Don't put several magnetic cards together, because several magnetic cards together will produce friction. Although this method can't degauss the magnetic card, it will damage the magnetic stripe area and may make the card unusable. So it's best to put the magnetic card in a special card bag and protect it.

? The magnetic card should not be near high temperature or humid environment. Generally magnetic cards are made of PVC. High temperature will deform or even burn PVC, which will directly damage the magnetic stripe. If you put the magnetic card in a humid environment or soak it in water for a long time, it will also cause the card to be damaged and eventually unable to be used. ?