Dictionarium polygraphicum. How to draw with Indian ink.

Dictionarium Polygraphicum:
Or, The Whole Body of Arts Regularly Digested.
Vol II.
London: Printed for C. Hitch and C. Davis in Pater-noster Row, and S. Austen in St. Paul's Church Yard. MDCCXXXV.
1735
This is to be done after the manner of washing, or instead of Indian, you may temper lamp-black or burnt bread.

Temper either of these in fair water, in a shell, or upon your hand; and the out-lines having been first drawn with a coal or black lead, dip the point of an indifferent sharp pencil into fair water, and then into the indian ink, and draw all the oudines of your picture very faintly.

2. Take notice, that all the temperature of Indian Ink must be very thin, waterish, and not too black.

3. When it is dry, rub out the out-lines, which you drew with the coal, with a bit of stale white bread; if too black, then dash on your shadows very faintly, and deepen by degrees, at pleasure; and finish it with stipples, it being most advantageous to any one who shall practise limning.

4. Be sure not to take too much ink in your pencil, which you may prevent by drawing it thro' your lips.

5. Never lay your shadows on too deep, but deepen them down by degrees; for if they are too deep, they cannot be heightened again.