Talking about the calibration method and uncertainty analysis of reflectivity meter

What is a reflectometer? It is mainly used to measure the contrast ratio of colorants such as colorants, pigments, paints and varnishes to the substrate. It can measure the transparency of various coatings, greases, thin films, etc., and can also detect the reflectivity of solid surfaces. At present, it is mainly used to detect the reflectivity of materials such as pigments and paints, and to improve technical parameters for the manufacture of materials such as pigments and paints. The reflectance meter is widely used in pigment and paint manufacturing enterprises. Its working principle is to define the reflectance of a satisfactory uniform diffuse reflector as 100, and the absolute black surface with a spectral diffuse reflectance of zero is the reflectance of zero. This paper analyzes and discusses the calibration method and uncertainty of the reflectance measuring instrument.