5.3.2.1 Definition
Metal effect pigments are flake-shaped metallic particles supplied in the form ofpow — ders, pastes, pellets, suspensions or color concentrates [5.166-5.168]. Typical metal effect pigments include aluminum (“silver bronze”) and copper — and copper/zinc — alloys (“gold bronze”).
Besides the metal effect pigments there are also metallic pigments and powders for functional coatings like anticorrosion, reflective, heat resistant and conductive coatings. These include zinc, stainless steel and silver pigments.
Aluminum pigments themselves are colorless pigments (pigment metal 1, CI 77000) but may be combined with transparent color pigments or dyes or other effect pigments. The color of gold bronze pigments (pigment metal 2, CI 77400) depends on the copper/zinc-alloy and range from copper (0% Zn) over pale gold (ca. 10% Zn), rich pale gold (ca. 20% Zn) to rich gold (ca. 30% Zn).
Additionally there are oxidized gold bronze pigments available, which obtain deeper color shades by a controlled oxidizing process during manufacturing.
5.3.2.2