This standard provides a test method for determining enamel retention in a Coating system. It aims to evaluate the effect of the interaction of undercoat and finish coat on Glossiness. Measurement of the difference in finish coat Glossiness relative to a smooth surface is done by testing on undercoat using a standard top coat to determine the effect of a Coating system. This method can be used to evaluate enamel retention properties of undercoat/finish coat systems or different Coatings, helping manufacturers and users to optimize Coating formulations. Implementation of the standard can help ensure the conformity of Coatings in their application and the desired visual effect.