PC sheets may look identical, but why are there such significant differences in performance? Many customers have a common observation when purchasing PC solid sheets: they look similar, have similar transparency, but the prices differ considerably. Initially, many tend to choose the cheaper option, thinking that since they are just "sheet materials," there shouldn't be much difference. However, after a period of actual use, problems begin to appear: yellowing, brittleness, cracking, and even replacement shortly after installation. These problems are not accidental; they are problems that were already present during the material selection stage.