Folding blister is also a card blister, which is a processing process after blistering and punching. Folding blister has three-fold side and four-fold side, and the three-fold side card blister box is generally completed in one time. If it is a four-fold blister box, it needs to be finished twice.

The card blister is to fold the three sides or four sides of the blister to the back of the blister by using a folding machine. Generally, it is not a blister of too large pieces, and a folded edge of about 1 cm is reserved, and the folded side is generally used. It is 8CM up and down. Folding is to make it easier to insert the paper card into the back. Fast packaging time is very important. Therefore, check the tightness of the blister blister. If the fold is too loose, the color card can easily slip from the gap of the fold. If it is too tight, it will delay the time of card insertion. The folding edge is elastic, the size and thickness of the folding edge plate are selected, and the heating time of the folding edge is related to the elastic of the folding edge.

The folded blister is usually placed on top of each other, which is the usual way of packaging the blister. Because the blister is a structure with convex and concave inner space, it does not stack and stack, which takes up a lot of space. Folding blistering is more about stacking layers. This is because the folded edges still have residual heat and are squeezed together. When it is cooled, the hem of the blister is already very conformable.

Folding blister usually has an aircraft hole at the upper end, and the product can be conveniently hung on the cargo bar when it is sold. Many small items, such as stationery, handicrafts, and daily necessities, use the card blister method, which saves cost and is beautiful.