| 摘要 |
Articles are coated by applying a base coat of film forming liquid organic material adapted to adhere to the article and provide a uniform glossy surface thereon, and accept a layer of vaporized metal, applying a decorative layer of vaporized metal to the base coat, applying to the layer of vaporized metal a first top coat of a transparent film forming liquid organic material adapted to bond to the layer of vaporized metal, remain transparent and colourless at environmental temperatures of the article and act as a barrier for a subsequently applied second top coat, and thereafter applying to the first top coat a second top coat of a transparent film forming liquid organic material. The article may be formed of a thermoplastic or thermosetting resin. Materials mentioned for the base coat are oil modified urethane, varnish, alkyd resin mixtures, alkyd resins, acrylic-alkyd copolymers, phenolic and oil varnishes; for the first top coat, oil modified urethane resins, alkyd resins, acrylic-alkyd copolymers; for the second top coat vinyl, acrylic lacquers, melamine alkyds, alkyd acrylics, styrenated alkyds, epoxy resins, urethane resins, nitrocellulose lacquers; e.g. acrylonitrile-butadiene-styrene copolymers, polystyrene. The liquid coating materials of the base coat and first top coat may contain aliphatic solvents or alcohols, whilst the top coat liquids contain aromatic solvents or oxygenated solvents. The base coat and first top coat may be applied by flow coating, and the finish top coat by spraying. Portions of the article not covered by the first top coat can be masked. The articles are cured or dried between successive coating operations say by heating. |
