This International Standard describes a method for the measurement of the local thickness of metallic coatings, oxide layers, and porcelain or vitreous enamel coatings, by the microscopical examination of cross-sections using an optical microscope. WARNING — The use of this document may involve the use of hazardous materials, operations and equipment. This document does not address any health hazard and safety issues associated with its use. It is the responsibility of the user to establish appropriate health and safety practices and to take suitable action to comply with any national and/or local regulations prior to its use.