example is Henri Toulouse-Lautrecís The Seated Clowness, from Elles.
The image looks as if crayoned due to the rougher, grainier texture. Multiple
colors can be introduced either through multiple stones with different series
of hills or by the artist carefully applying different color inks to
different crayoned lines. Also typical of crayoning, the density of color may
vary. Denser areas of crayon lines will produce areas of flatter, more
consistent color. Areas with light or sketchier applications of lines will
not print as well and reveal more of the paper underneath. However in the
case of Toulouse-Lautrec, the crayon lines are light in touch and organic in
direction. The image looks sketchy as if created with furia and sprezzatura.