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Aux trois crayons is an art technique that uses three colors of chalk: red, black, and white. This method, also known as the "three-crayon" technique, was developed by Rococo artists like Antoine Watteau and François Boucher. It allowed for a greater expressive range in drawings, comparable to watercolors or pastels, by creating effects of mass rather than just line. The technique was popular in the 18th century, and chalk drawing itself dates back to Paleolithic times, often used for preliminary sketches or as a finished medium.1

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2 Britannica Sources
  1. chalk drawing
  2. Jean-Charles François

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