Through the electronic labels on supermarket items, the electronic labels are magnetic.

Most goods with magnetic bar codes are added by manufacturers, because all supermarkets with magnetic strips order large brown. Specially added for supermarket orders. What you bought in a small supermarket doesn't necessarily have a magnetic stripe. Some of them directly stick a bar code with a magnetic stripe on the standard bar code label, and some of them are hidden behind the label and covered by the standard label, and the original bar code remains unchanged.

magnetic stripe and bar code have two functions, magnetic stripe is used for anti-theft and bar code is used for computer identification of goods.

Extended information:

Lighters and clips are needed. The specific operations are as follows:

1. Prepare supermarket magnetic nails, lighters and clips.

2. First, burn the protruding part of the supermarket magnetic nail with a lighter.

3. The burning knife has been blackened, browned and softened as shown in the figure below, but the plastic will not drip down.

4. Then use a clamp to clamp the magnetic nail in the middle, and clamp it hard. If you still can't clamp it out, burn it for a while.

5. Just clip out the black spring nail as shown below.