|
Copper and gold powder (also known as gold powder) is a copper zinc alloy as raw material, through a special machining and surface chemical treatment system has a metallic pigment flake structure, can in the binder float, showing gold luster, with pigment properties. Gravure printing because of its brilliant metallic luster, with the main body and the eye-catching effect, in plastic, advanced pictorial, high-grade packaging, cigarette shell, security printing and other aspects of the widely used [4, 5]. Put forward higher requirements to the main technical indexes of bronze powder metal, surface gloss, cover rate, particle size and distribution of copper and gold powder, the traditional production process has been difficult to meet the modern requirements, therefore, it has important realistic significance to deep research and development of bronze powder. |
