Coquille board

[1] Used with a soft lithographic crayon or carbon pencil, coquille produces a shading effect similar to hand stippling in a fraction of the time.

[2] The material is especially useful for works to be reproduced in print, such as scientific illustration and cartooning.

[1][3][4] However, coquille is also delicate and cannot withstand vigorous pressure from an eraser.

[2] It was used extensively during the pulp era to quickly create easily-reproducible print images.

By the early 1990's it had been displaced by cheaper halftoning technologies and became difficult to obtain.