ISO 2813-2014 "Paints and varnish - Determination of specular gloss of Non-metallic Paints films at 20 °, 60 ° and 85 °" is an international standard for assessing coating Glossiness. The standard specifies methods for the measurement of coating surface Gloss at different angles (20 °, 60 ° and 85 °). Appearance characteristics of coatings are assessed through precise measurement reflectance for non-textured coatings on a variety of flat, opaque substrates. The fourth edition of this standard updates the terminology and Measuring method to use Gloss units (GUs) to represent Gloss values and adds details on calibrating, accuracy and possible sources of error. ISO 2813-2014 applies to quality control and product evaluation for coatings and varnishes, ensuring that coatings Appearance at different viewing angles meets design and industrial requirements.