crayon

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Related to Wax pencil: Chinagraph, Chinagraph pencil

crayon

a soft color-marking material used in identification especially in sheep.

crayon-marking
marking of ewes by rams wearing crayons on their chests and held there by a harness. By changing the color of the crayon it is possible to date the reproductive events of the flock. See also tupping crayon.
References in periodicals archive ?
I use a technique called aquatinting, which enables me to create many different tones on a plate, and I frequently draw on to the copper with wax pencils to act as a resist against the acid.
Some departments use a dry erase board, others use Plexiglas boards to write on with wax pencils, and others use just a pen and paper.