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