| 摘要 |
Printed matter comprising a plurality of elements applied in printing and causing in a half tone reproduction a moiré pattern each element being made up of alternatingly print zones and blank zones being delimited by portions of curved lines, said curved lines being comprised in a set of curved lines which set is a topological equivalent of a set of concentric circles (61, 51, 41, 31, 21, 11, 1) wherein the sum of the areas of the print zones equals the sum of the areas of the blank zones. A super element accordingly comprises two or more elements, each element forming a track, the zones in the respective elements or tracks (10, 20, 30, 40, 50, 60, 70) being different as to their width, each element thus representing a different spatial frequency as shown in the figure 2. A method for manufacturing printed matter is characterized in that the print area in an element or super element equals the non-print blank area therein.
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