"JIS K5600 - General Test Method for 4-1-1999 Coatings - Part 4: Film Visual Performance - Section 1: Hiding Power (for Light Color Coatings) " is the specification for Coating hiding power testing in the Japanese Industrial Standard. This standard applies to light-colored coatings and evaluates the hiding power performance by measuring the ability of the film to cover the substrate Color at a specified film thickness. The test uses specific substrate, Spreader method and standard observation conditions to ensure the accuracy and conformity of the test results. The standard provides a technical basis for Coating manufacturers and users to evaluate the covering performance of light-colored Coatings, which can be used for Coating research and development, quality control and performance verification in practical applications, and promotes the mass improvement and standardization of the Coating industry.