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Because the main raw material of spot color printing gold ink is brass powder, it is a chemically active metal, which is prone to discoloration after exposure to air.
Concavo-convex embossing is one of the most frequently used processes in post-press processing technology. Combined with the paper material of Black Chocolates Packaging Box
According to different hot stamping templates and process technologies, the types of hot stamping anodized aluminum of high quality luxury sliding drawer box can be divided into the following types