This standard provides two test methods for determining the hiding power of powder coatings: Method A measures the contrast ratio at a specific film thickness, and Method B measures the film thickness to a contrast ratio of 0.98. The level of hiding power directly affects the economics and effectiveness of the coating, so understanding hiding power is critical to production and procurement specifications. The test uses a reflection meter and a thickness gauge, and is only applicable to coatings with a minimum CIE-Y reflectance of 15%. SI units are standard units, and the values in parentheses are for reference only.