Depending on the depth of the burr, shade and light areas were produced. Pure white was obtained by entirely effacing the burr and burnishing the plate.By extension, a form of half-tone screen which imitates this effect.

• 因不同的芒刺深度而获得不同明暗的色调；光白部份则把芒刺激完全磨去。引用这个名称，模仿这个效果的半色调网片，称为沙粒网。