Charcoal. In laying out a drawing, to be made by means of charcoal or crayon, make a faint outline of the shadows where they meet the light. After having done so, charcoal the mass of shadow within the outline, making a flat, even, dark tone. In order to do this with the charcoal, draw straight parallel lines, slightly oblique, almost touching each other, until the whole shadow is covered. A large paper stump, or the rag, is now used to unite these charcoal lines into one flat tone of dark. The stump is held in the fingers, so that about an inch of the point lies on the paper, net merely the tip end. With this, the charcoal is rubbed in until no lines appear, but instead an even tone of dark fills in the outline of the shadow.
Should too much charcoal get on the paper, while laying in a mass of shadow, it may be wiped off lightly and evenly with the rag. Then, if the tone has become too light, work on it again with the charcoal, as before, using the stump in the same way until it is satisfactory.

In this exercise, cover the entire surface of the paper with a single dark tone. Add the blacks and take out the high lights with white crayon or chalk.
After all the shadows are put in and the proportions are found to be correct, further details may be added with the point of the charcoal or crayon.
Keep a clean stump always at hand for delicate half tints.
"Sauce" is sometimes used for putting in large masses of dark, such as shadows, drapery, etc. Sauce is a finely powdered crayon, but not used as such.
The "sauce" should be rubbed off on a small piece of charcoal paper, and tacked on one side of the drawing for convenience. It is used for especially delicate tones.
The charcoal or crayon point is always used in finishing up a drawing, with the darkest accents being put in last.
The high lights are taken out with the bread rolled to a point, and should be made sharp and distinct.