Article having patterned decorative coating
A decorative and patterned technology, applied in coatings, metal material coating processes, devices for coating liquids on surfaces, etc., can solve problems that are not suitable for mass production of consumer goods
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example 1
[0068] According to a working example, a brass faucet handle was plated with a nickel chrome double plating stack to provide a chrome finish to the handle. The coating comprising zirconium oxycarbide was deposited on the part using cathodic arc evaporation in a vacuum chamber at subatmospheric pressure. A second coating of zirconium substoichiometric nitride was then applied also using cathodic arc evaporation. An etch mask layer of water resistant permanent ink is applied to the part. Parts are subjected to a roll polishing or vibratory mass polishing operation using plastic media to partially remove the ink. The part is then etched with a dilute solution of ammonium bifluoride to remove portions of the top coat layer exposed in areas where the masking layer was removed. Finally, the part is dipped in a solvent (eg, acetone, TCE, etc.) to remove the ink. The top coat layer in the areas protected by the ink remains intact, providing a visible patterned "aged pewter" surface...
example 2
[0070] According to a theoretical example, an injection molded plastic shower spray enclosure was plated with a copper, nickel and chrome plating stack with a chrome finish. The parts were mounted in a vacuum chamber and coated with a dark gray layer of zirconium oxycarbide with a thickness of approximately 0.4 microns. The part is removed from the vacuum chamber and the lacquer masking material is applied non-uniformly in streaks using an automated brushing system and exposing at least a portion of the surface of the oxycarbide layer to the penetration of the masking layer (non-coverage region). The part is then etched using a dilute solution of ammonium bifluoride to remove the exposed portions of the paint layer. Finally, the part is rinsed with a solvent to remove the paint masking material, exposing the remaining unetched oxycarbide surface, resulting in a "antique" finish with a black background and a chrome sheen or the opposite color. A finish in which a black backgr...
example 3
[0072] According to another theoretical example, a zinc die-cast tub spout was plated using a copper, nickel, and chrome plating stack with a chrome-colored surface. A thin etch-mask layer of water-resistant ink or acrylic paint is formed over the part. The part is then automatically or manually "wire-brushed" using a motor wire or fiber wheel in a random or striated pattern, thereby creating a scratch pattern in the etch mask layer, resulting in a chrome-colored substrate Part of the surface is exposed. The parts are mounted in a vacuum chamber and coated with a dark gray or black diamond-like layer. Diamond-like carbon can be deposited by ion beam or hot wire PECVD to a thickness of at least about 0.2 microns, preferably at least about 0.3 microns to 0.5 microns or greater, with thicker coatings forming darker colors. A thin metallic adhesion layer comprising, for example, zirconium may optionally be deposited prior to the deposition of the diamond-like carbon. The parts ...
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