The Artist's Assistant, In the Study and Practice of Mechanical Sciences: Calculated for the Improvement of Genius. Illustrated with Copper-Plates (Birmingham, [ca. 1785])

THE ARTIST'S ASSISTANT. 1*7

mine or lake, one to the blue, this to the green, and
that to the yellow, &c. In order to produce thefe
different effefts he will apply thofe colours to which
the teints are mod inclined; yet in crayon painting-
it is often bed to compound the mixed colours upon
the picture, fuch as blue and yellow inftead of
green ; blue and carmine inftead of purple ; red
and yellow inftead of orange ; in other circum-
fiances the compounds already mixed fhould be
ufed : but in this cafe there can be no abfolute rule
given, it muft be left to the experience and difcre-
tion of the painter, though the ftudent maybe greatly
affilted in the commencement of his ftudies, by an
able mafter to direft and point out the beft method
to treat circumftances of this nature, as they oc-
cur in practice, which may at firft appear obfcure
and myfterious, but will foon, to a good capacity,
become demonftrably clear upon certain and fure
principles; the circumftances that require different
treatment are fo various and fo many, as to render it
impofhble here to defcend to every particular.

In finifhing the checks, let the pure lake clear them
from any duft contracted from the other crayons ;
then, with the lake, may be intermixed the bright
Vermillion ; and laft of all (if the fubject fhould
require it) a few touches of the orange coloured
crayon, but with extreme caution ; after this fweeten.
that part with the finger as little as poffible, for fear
of producing a heavy, difagreeable effeft on the
cheeks : as the beauty of a crayon picture confifts
in one colour (hewing itfelf through, or rather be-
tween another ; this the ftudent cannot too often re-
mark, it being the only method of imitating beau-
tiful complexions.

The