: A multi-layer coating consisting of 15µm copper (M), 15µm nickel (N), and a final layer of bright chrome (X.b).

In technical drawings, chrome coatings are typically labeled according to . For example: Х9 : A 9-micrometer layer of chrome. gost hromirovanie

Based on these standards, chrome plating is generally divided into three functional categories: : A multi-layer coating consisting of 15µm copper