Zipper plastic bags are also a very common type of plastic bags, which are widely used in the clothing industry. Especially in the e-commerce industry, this kind of plastic bag is the most used. Compared with self-adhesive plastic bags, zipper plastic bags have greater advantages. After returning from customers, self-adhesive bags cannot be used again. At this time, the zipper plastic bag plays a very important role. According to relevant statistics, in the general e-commerce industry, the return rate can reach up to 40%, which is the main reason why zipper plastic bags are so widely used in the e-commerce industry. Regarding the materials used for zipper plastic bags, there are generally two main types, namely CPE worn material and PE transparent material. Using the frosted material as the background will make the products inside the plastic bag look taller. Most of the zipper plastic bags are printed by copper plate printing. This is because offset printing has a fatal flaw, which is very prone to uneven ink, which seriously affects the overall appearance of the plastic bag, thereby affecting the image of the product in the minds of consumers. Therefore, many merchants choose copperplate printing, but some merchants use offset printing in order to save costs.