A method of manufacturing a deep-drawn formed plastic piece comprises providing a cold-stretchable sheet material with a coating selected from a group of an ink film, an ink imprint, a vacuum evaporated metallic thin film, and an electrically conductive varnish film. The coated sheet is heated with a...http://www.google.com.au/patents/US5108530?utm_source=gb-gplus-sharePatent US5108530 - Method of producing a deep-drawn formed plastic piece
