Card insertion packaging refers to the packaging form of inserting the paper card and the transparent foam shell which has been folded through three sides. Its characteristics are that no packaging equipment is needed during packaging, only workers are required to put the products, foam shells and paper cards in place. Card suction packaging refers to the heat sealing of the foam shell on the surface of the paper card with plastic oil, which is commonly used in supermarket battery packaging. It is characterized by the need for blister sealing equipment to package the product between the paper card and the bubble shell. Double blister packaging is a kind of packaging that uses two blisters to encapsulate the paper card and the product. It is characterized by low efficiency and high packaging cost, but the edge is neat and beautiful, and the product appearance is high-end. The whole meaning of semi blister packaging is the semi exposed double blister packaging of the product. It refers to the packaging form in which the paper card and the product are packaged together with two blisters, but the part of the product is exposed outside the blister, which is suitable for products with extra long length. It is characterized by the need to use scissors to cut the exposed parts of the blister first, and then seal the double blister with high frequency machine. The efficiency is low, the packaging cost is high, but the visual effect is good, and it can meet the user's demand of directly touching the product when selecting goods in the supermarket. The whole meaning of external semi blister packaging is that all products are placed outside the double bubble shell. The double bubble shell only encapsulates the paper card and serves as the bottom support of the product head. The product is connected with the foam shell with plastic bandage. It has the advantages of low efficiency and high packaging cost, but it can meet the needs of users to touch the products.