DIN 51176-2
DIN 51176-2 Vitreous and porcelain enamels - Presentation and characterization of defects - Part 2: Thin-film coats
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2008
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2008