Special technology is used to make a type of matrix on the reverse side of the material. (Commonly, the matrix goes “VOID”, ”OPENED”, or special version specified by the customers. ) When the sticker is tore up from the surface of the object, the preestablish matrix or pattern will stay on the surface of the object perfectly. And the sticker can not be recovered any more. It plays an important role in warning. It is used to distinguish the phenomenon that the products are to be opened without authorization and illegally. It can also help to protect the trademark of the application products effectively.