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After etching, the products are metal color, and many of them need subsequent surface coloring treatment: a surface color whitening treatment; b surface mirror bright treatment; c Surface coloring treatment.1. Surface color whitening treatment: precision etching products in the process of processing
The thermal transfer machines and the gold perm were transferred on the medium through stress and heat sources. The gold perm is a device with a certain temperature and pressure to the surface of the item, and the thermal transferor is a silicone roller to use the heat transfer ink specialty to the
As early as the 1930s, people did use gold or silver to make hot stamping. Because its chemical properties are stable and it is not easy to oxidize in the air, use their good ductility to make it into a very thin metal foil by knocking and rolling
