Lead plates are primarily composed of lead, featuring high weight and density. They are sheets formed by mechanically pressing molten lead ingots. These plates offer functions such as radiation protection, corrosion resistance, acid resistance, and X-ray shielding. Currently, lead plate thicknesses in China commonly range from 1 to 100mm, with radiation protection lead plates generally being 2 to 20mm thick to effectively prevent radiation. Definition: The main component of lead plates is lead (Pb), which has a high density (11.34g/cm3). Lead is a silvery-white metal (slightly bluish when compared to tin) that is very soft, leaving visible marks on its surface with a fingernail. Lead is prone to rust and oxidation. It often appears gray because it readily oxidizes into gray-black lead oxide in the air, causing its silvery luster to fade. The thickness of radiation protection lead plates is generally between 1100mm. Generally, lead equivalence or protection equivalence refers to the radiation protection effect achievable by a 1mm thick lead plate. 3. Like in a radiology CT room: The walls must be protected with thin 3mm thick lead plates to achieve radiation shielding. The floor can be coated with barium sulfate cement at a 4:1 ratio, with a thickness of 40mm. If a lead-protected door is to be installed, the lead equivalence must reach 4-5 equivalents. The observation window's lead glass thickness must be 20mm to provide effective radiation protection.