What is the principle of seven color vacuum electroplating?
Evaporation of a substance by heat causes it to deposit on a solid surface, known as a colorful vacuum plating. This method was first proposed by M. Faraday in 1857 and has become one of the common electroplating techniques in modern times. Structure of evaporative electroplating equipment. Evaporating materials, such as metals and compounds, are placed in the crucible or hung on the hot wire as the evaporation source, to be plated workpiece, such as metal, ceramic, plastic and other substrates are placed in front of the crucible. After the system has been pumped to a high vacuum, the crucible is heated to vaporize the material therein. Atoms or molecules of vaporized material are deposited on the substrate surface by condensation. Film thickness can range from hundreds of angstroms to several microns. The film thickness depends on the evaporation rate and time of the evaporation source (or on the amount of charge) and on the distance between the source and the substrate. For large-area coatings, rotating substrates or multiple evaporation sources are often used to ensure the uniformity of film thickness.
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