Yarka Classic Drawing Crayons are hard pastel sticks, 3/8" in diameter and 2-1/4" long, for use on paper, board, or primed canvas.
They are made from high-grade pigments and Chasov Yar clay. Sanguine is a Reddish-Brown color, much like Sienna, and Sepia is a Yellowish-Brown, resembling Umber. ...
Yarka is a registered trademark.