| 摘要 |
<p>A security paper 10 is comprised of a substrate 12 that contains, on at least one part of its surface, an impression 20 of at least one type of ink, provided with two or more zones 26, 28 and/or 30 with different reflection of light. Said zones are comprised of alternating embossed 22 and recessed 24 sectors, formed by adjacent parallel rulings, oriented differently from each other in groups. The impression 20, of reflecting or metallic ink, is first produced by offset printing on the substrate 12 and then subjected to dry copperplate printing. <IMAGE></p> |
