Product Presentation The diffuse reflection standard blackboard is embedded in an aluminum alloy shell with a threaded cover. The reflective properties of the diffuse reflection standard blackboard enable it to maintain constant contrast under a wide range of lighting conditions, so it is completely suitable for laboratory and field applications that require long-term exposure to harsh environmental conditions. The high stability of its material can obtain repeatable and accurate data. The standard blackboard can be combined with a spectrometer and a light source to form a diffuse reflection test system, which is suitable for measuring the reflectivity of various samples, such as silicon wafers, ceramics, frosted glass, plastics, etc.