Method for engraving a gravure cylinder.

摘要

The method involves determining a coverage VA, of the liquid composition on the substrate. A stylus angle theta is selected. A compression angle alpha is selected. A first ratio of channel width Wc to cell width Wo is specified. A second ratio of a wall width Ww to cell width Wo ratio is specified. The cell width Wo is calculated according to Wo=X-Wc-2Ww. X is a horizontal repeat length and VA = 1122.5tantheta /2 ?[3Wo2 + 2WoWc + 3Wc2?](2 /X). The channel width Wc is calculated according to the first ratio. The wall width Ww is calculated according to the second ratio. The gravure cylinder is engraved according to theta , alpha , Wo, Wc and Ww. The compression angle alpha is greater than 38[deg]. The first ratio is between 0.15 and 0.30. The second ratio is between 0.10 and 0.25.