The ISO 6504-3-2019 standard defines methods for evaluating Coating hiding power for masonry, concrete and indoor use. The standard describes two measurement techniques: one is coating Spreader on a black and white chart, and the other is using transparent foil for measurement. The standard introduces new methods for water-based paints and simplifies the measurement process for hiding power. Major changes include the removal of the old method related to spreading rates and the introduction of new inter-laboratory comparison information, ensuring conformity and accuracy of measurement results.