Coloring method for red spot copper

The present invention relates to a coloring method for a red spot copper, and belongs to the field of metal material surface treatment and handicraft product production. The coloring method comprises: selecting a copper-zinc alloy casting having a copper content of 97-93%, carrying out a coloring pre-treatment, placing the casting in a spot emergence solution to carry out erosion for 5-10 minutes to emerge spots, and placing the spot emerging casting in a coloring solution to soak for 8-10 hours to appear red, wherein a specific time can be controlled according to color requirements of the specific handicraft product, and the longer the soaking time in the solution is, the more significant the red coloring effect is. The preparation method has the following advantages that: operation is simple; production cost is low; a production period is short; no product shape limitation exists; the product has a beautiful color; and the like.