EN ISO 19403-1:2020

The ISO 19403 series specifies optical test methods- for the measurement of the contact angle,- for the determination of the free surface energy of a solid surface, including the polar and dispersive fractions,- for the determination of the surface tension of liquids, including the polar and dispersive fractions, and- for the checking of the measurement arrangement with reference materials.It can be applied for the characterization of substrates, coatings and coating materials.The applicability can be restricted for liquids with non-Newtonian rheology[1].ISO 19403-1:2017 specifies terms and definitions and defines the general principles.[1] This term is defined in DIN 1342-1.