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Aesthetics plays a vital role in the product success and plastics provide a wide scope of decoration through various decorative techniques. Unlike metals where color is only at the surface in plastics color is distributed with in the material. This section deals with the decorative techniques of plastic parts. Techniques of lettering/multi colors on plastic parts are broadly categorized as processes during molding and post molding processes. Coloring techniques during molding process are performed during the molding of a component. They are double injection molding, dye injection molding and in-mold decoration. Post molding processes of coloring are those which are performed after the component is molded. They are painting, printing, screen printing, hot stamping, pad printing, water transfer, flocking, masking and vacuum metallizing.