Water ripples and bubbles are watermarks and bubble spots on the surface of the material.

Such blister products will directly affect the appearance of the packaging and reduce the appearance of the packaging. The cause of the water ripple is the relationship of the film merchant. in the process of production, the water ripple is related to the speed of the film production. The reason for bubbles is that the temperature during sheet production is too high or is caused by mixed production of sheets or the infiltration of air into sheet production. Materials with bubbles will lead to perforation and deformation of blister packaging products and become inferior products. The solution is to observe the quality of the sheet when the material is purchased or before production before it can be put into storage or production.