Determination of coating whiteness
The whiteness of the coating film can generally be evaluated by visual inspection, but due to the difference in people's vision, the real white cannot be objectively evaluated, so it is measured by instruments.
Coating whiteness measurement is a method to evaluate the whiteness and brightness of the coating surface. It is mainly used to test the whiteness and color difference of the coating surface.
Coating whiteness measurement is usually tested using colorimetry, which can calculate the whiteness and color difference of the coating surface by comparing the reflectivity difference between the coating sample and the standard whiteboard. The specific operation steps include: placing the coating sample and the standard whiteboard under a light source, using a colorimetric instrument to measure the reflectivity of the two, calculate the reflectivity difference and convert it into whiteness value. Among them, the commonly used whiteness measurement units are CIE L *, Y, W, G, etc.
Coating whiteness measurement can be used to evaluate the whiteness and color difference of various types of coating surfaces, such as automotive paints, architectural paints, furniture paints, etc. By measuring the whiteness and color difference of the coating surface, the color stability and quality of the coating can be evaluated, providing basic data for formulating coating maintenance and improvement plans.
