Hardened board, also known as hardened wear-resistant board. Using optical grade acrylic sheet or PC sheet as the base material, the surface is strengthened and improved by nano-strengthening (hardcoating) technology to increase the surface hardness to 4 to 5H, which is wear-resistant and scratch-resistant, and does not deform under high temperature, humidity, heat, etc. Features. It is an ideal material for manufacturing optical lenses, electrical panels, instrument panels, signs, and protective screens.