Tamper evident security self adhesive printing material which made of PET can be classified as

1)Reveals stencil warning message or graphic once opened.
2)The layer will be separated then reveal the hidden message once opened. Of the purpose of avoiding every attempt of opening, removing, resealing. Applicable for the transportation, anti-counterfeiting seal, and security seal; Separated layer material applicable for the electrical code anti-counterfeiting label.

This kind of label, once peel off or opened will reveal the pre-set message of graphics. That means there will be some evident, structure breach on the surface of the label and applied object. Such as "VOID OPENED". With the feature of "once opened, breach; Once breach, evident; Once evidentso to identify the true and can not reseal"