crayon

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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 ?
Claudette Anderson Copeland, pastor of New Creation Christian Fellowship Church in San Antonio; and Marilyn (Francine) Braxton, controller of Chinagraph, a commercial editing/production company in New York City.
The tools of the gun editor were a chinagraph pencil, cotton gloves, stainless steel dust, benzine, aluminised Mylar tape, a splicing block and of course a razor blade.
On the positive side, though, the Tuffmap will take a wax pencil like a Chinagraph - ideal for marking the important details of a route - and then allow you to wipe it clean later.
Symbols in chinagraph pencil showed the position of a heavily armed Iraqi tank division.
Last week, they were still editing news copy and quotes on reel-to-reel tape, listening for the correct points to make cuts which were marked up in chinagraph pencil and sliced with a razor blade.