The definition of water ripples
In the blister sheet production process, due to the different materials and processing technology to produce the finished sheet surface of the water ripple, especially in a transparent blister sheet production process, this water wave is too large, too large shall be deemed defective. In general, the thicker sheet, the more obvious the water ripple. Very few qualified PET materials, water ripples, but most have a water wave PVC existence of the phenomenon.