| 摘要 |
<p>An article comprises a substrate (2) including a structure (3) for generating an optically variable effect. The substrate is partially provided with an indicia receptive coating (5) such that at least part of the optically variable effect (3) remains visible. Possible optically variable effects include diffraction, interference and polarisation effects. These effects are generally visible in white light. A method of manufacturing articles comprises providing a substrate (2) which includes a structure (3) for generating optically variable effects. A partial continuous indicia receptive coating (5) is provided on the substrate (2) such that at least part of the optically variable effect remains visible. An article manufactured in this way may receive security printing (6) on the indicia receptive coating.</p> |
