The gold powder is actually copper powder and bronze powder (copper-zinc alloy powder). The copper content in the copper powder is increased, and the color is from red light to blue light. Coloring with gold powder gives a metallic luster. The coloring effect of gold powder also varies depending on the thickness of the particles. The coarse powder has a diameter of 50 μm to 100 μm, and the colored plastic is bright gold. The fine powder diameter of 10 μm to 20 μm makes the color and feel like satin.
To use gold powder to produce a good metal effect, the color of the plastic is better, so try to avoid using it with titanium dioxide, including pearl powder coated with titanium dioxide. For example, if the brightness is increased, and the pressure is increased during processing, the alignment of the gold powder can improve the metal effect. However, it should be noted that gold powder should not be used for the coloration of polypropylene, and the amount of gold powder added is 1% to 2%.
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