Subtractive drawing
Subtractive drawing is a technique in which the drawing surface is covered with graphite or charcoal and then erased to make the image. Artists commonly use a kneaded eraser for this type of drawing, due to its ability have custom or fine tips.[1]
Footnotes
- South, Helen, The Everything Drawing Book, Adams Media, Avon, MA, 2004, pp. 152-3, ISBN 1593372132
gollark: And the variables are guesses.
gollark: You said "solar system" before.
gollark: (sorry for kind of interjecting, I was replying to stuff in <#426053961624190986> somewhat late and it was said that that stuff didn't fit there)
gollark: <@!410159621651562508> Drake's Equation is basically just for roughly guessing about the commonness of intelligent life. <https://en.wikipedia.org/wiki/Drake_equation>"average number of planets that can potentially support life per star that has planets" is a *variable* in it.
gollark: Oh, you got an answer in the other channel.
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