| 摘要 |
<p>A coloured design is printed onto a polymer surface (preferably by a four-colour printing process) such that the design penetrates into the polymer surface and cannot be erased by solvent action or mechanical abrasion without destruction of the surface. The polymer is preferably in the form of a sheet, film or coating and the non-printed surface is subjected to elevated temperature before or during application of the printed design. </p> |
