DIN ISO 9211-4:2008-06

This part of the standard describes surface treatments of components and substrates excluding ophthalmic optics (spectacles) by the application of optical coatings and gives a standard form for their specification. It defines the general characteristics and the test and measuremnt methods whenever necessary, but is not intended to define the process method. Part 4 of the standard describes specific test procedures for coating environmental durability tests that are identified in DIN ISO 9211-3 but not described in other normative references.