First of all, the unstable quality of raw materials is one of the main reasons for the difference in PVC film batches. The quality and performance of PVC film directly depend on the quality of raw materials, including resins, plasticizers, stabilizers, etc. If the quality of the raw material is unstable, the performance of the film material will also be unstable, leading to product problems
The printing of the color film layer controls the appearance of the surface, and each production batch of the printed fabric will produce different degrees of color difference due to its printing process control and ink adjustment subtle differences, which cannot be absolutely consistent, in addition, the mainstream market factory through the worker’s eye to confirm whether the color is consistent with the last batch of times, so it is easy to produce color difference.
Because the membrane structure is not a single layer, it is easy to produce color difference when the multi-layer structure is finally bonded by pressing and molding at high temperature and high pressure within a certain time. Even if controlled under absolute standard process conditions, when the temperature and humidity change, the molded product will also produce color difference due to the difference in visual Angle.
