Product Introduction Compared to other standard boards, the diffuse reflection standard whiteboard has high stability and is suitable for a wide spectral range of ultraviolet visible near infrared (250-2500nm). The reflectance ratio can reach up to 99%. The size of the diffuse reflection standard whiteboard is 80x80mm, and users can customize the size according to their needs. It is made of imported PTFE material processed at high temperature, which has waterproof function and will not lose powder or turn yellow over time. It is a commonly used Lambertian reflector in the wavelength range of 250-2500nm. This diffuse reflectance standard whiteboard can be combined with a spectrometer and a light source to form a diffuse reflectance testing system, suitable for measuring the reflectance of various samples, such as silicon wafers, ceramics, frosted glass, plastics, etc.