2: Film types used: transparent PET, translucent PET, transparent OPP, translucent OPP, transparent PVC, glossy white PVC, matte white PVC, synthetic paper, glossy gold (silver), polyester, matte gold (silver) polyester fat. 3: Adhesive types used: general super sticky type, general strong adhesive type, refrigerated food strong adhesive type, general re-peeling type, fiber re-peeling type self-adhesive stickers 4: Used backing paper: white, blue, yellow glassine Paper glassine (or garlic paper onion) kraft paper polyester PET coated paper polyethylene polyethylene. The earliest self-adhesive was produced in the hands of a chemist from 3M Company in the United States. It was in 1964. At that time, when he was studying various adhesive formulas, he formulated a new type of adhesive that was highly viscous but not easy to solidify. Use it to stick something on and it can be easily peeled off even after a long time. At that time, people thought that this kind of adhesive would not be very useful, so they did not pay attention to it. In 1973, a new tape product development team of 3M Company applied this glue to the back of commonly used trademarks, and then attached a piece of paper coated with a trace amount of wax to the glue. In this way, the world's first trademark paper was born. As a result, the role of self-adhesive labels has been discovered one after another, and more and more people are using self-adhesive labels. Self-adhesive labels can be roughly divided into two types: one is paper self-adhesive labels, and the other is film self-adhesive labels. Self-adhesive stickers