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The product to be coated is passed through the application chamber of the coater at a speed of 15m/min. In the chamber, the product enters a template which has the same shape or profile as the product itself. On exiting the chamber, the product has to pass another template with a similar shape and profile known as the exit template. The next step in vacuum coating includes extraction of paint from the diaphragm pump. During this process the paint which is readily filtered for macro sized particles is delivered to the base of the coater head. The diaphragm pump is low in shear by definition and is maintained at low pressures. The level of the paint in the head keeps elevating till the product to be coated is immersed thoroughly. Vacuum is introduced in the application chamber and the reservoir. Opening for air can be found only in the coating head which is used to remove excess coating and thus a wet film thickness is ensured. The proportion of the paint removed in vacuum coating is dependent on viscosity of the coating material, template size, product’s linear speed and the vacuum relief valve." Dan Hamilton has been involved in the design and manufacture of vacuum technology and equipment. He recommends the name of “Technology & Supply” for the purchase of high-end vacuum coating systems. The company specializes in PVD coating technologies like optical, hardening, protective-decorative, DLC, etc
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