SIM-6304 Diffuse Reflectance Standard is widely used and can be combined with a spectrometer and a light source to form a system for measuring the reflectance of various samples. It is suitable for measuring the reflectance of various samples, such as the surface reflectance of rough samples, ceramics, matte glass, plastics, etc. It is made of PTFE, and its surface is Lambert diffuse reflectance surface, the reflected light in any direction, all obey the law of cosine. Housed in water-resistant anodized aluminum, it is stable and suitable for deep UV applications.