After being made into boards, Pc transparent boards undergo secondary treatment, mainly through hardening treatment. The main reason for hardening treatment of endurance boards is that the surface hardness of transparent PC boards is not enough, which is prone to scratches and scratches, greatly limiting their application. Since the surface of the endurance board has undergone appropriate hardening treatment, it can reach 2H through surface hardening. However, it should be noted that not all quality transparent PC boards can be hardened, indicating that hardened endurance boards have strict requirements for the board. One important prerequisite is that the surface of transparent PC boards needs to be free of mold lines, water ripples, and other phenomena in order to undergo hardening. One major drawback of hardened transparent PC boards is that they undergo surface hardening treatment, which affects their flexibility. Transparent PC boards become brittle and are prone to brittle cracking during processing or installation. At the same time, the board cannot be bent and can only be placed flat during the placement process. So although hardened endurance plates meet the needs of some customers, their overall application in the market is still very small.