Precautions for use Standard reference aluminum mirrors can be used when setting high reflectivity datums The aluminum film is protected by a layer of fused silica coating, and users should still be careful when using it to ensure that the standard surface is not damaged. Do not touch surfaces with your hands or objects to avoid contamination and damage. When cleaning the surface, first blow off the dirt and dust on the surface with high-pressure gas, and then use the traction cleaning method to remove fingerprints and fixed residues on the surface. Traction cleaning The method is to use lens paper dipped in acetone or alcohol and slowly pull it over the surface of the lens. Then drag it on the mirror surface in one direction, and then let it dry naturally. Generally no wiping is required. The solvent volatilizes evenly without leaving tailing or stains on the lens surface. The exposed metal layer is very clean and precise, and cannot be cleaned in this way. Fingerprints and dirt can cause permanent breakage in it. Bad, users must be very careful when operating it to extend its life.