CPC B42D 25/369 (2014.10) [B42D 25/40 (2014.10)] | 19 Claims |
1. An assembly, comprising:
a first magnet;
a substrate positioned above the first magnet, and having a surface for receiving a composition including a plurality of magnetizable platelets; and
a second magnet, positioned above the substrate;
wherein the first magnet is incorporated into a first cylinder, and the second magnet is incorporated into a second cylinder; and
wherein the second cylinder is hollow, and the second magnet is cylindrical.
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