The effect of Zn addition on the color characteristics of the CuZn alloy castings was studied. The experimental results show that with an increase in Zn content

the red color fraction of an alloy decreases first and then increases

while as the yellow color fraction and lightness value increase first and then decrease

the alloy surface color changes from copper red to golden yellow

yellow

green yellow

yellow

and golden yellow. By adjusting Zn content

the alloys with 18K or 14K gold colors surface can be obtained

but those with 24K gold color surface can not be obtained.