Use a sheet of acetate 10 x 7cm (5 x 2¾ inches) in size Randomly dust the acetate with silver powder on some cotton wool. (1) Thinly and evenly spread the tempered chocolate over the top with a step palette knife.
When semi-set, take a knife and a ruler and score long triangles lengthways across the chocolate. (2)
Place another sheet of acetate the same size on top. Quickly place between 2 sheets of corrugated plastic and gently push down. (3)