Pastel, dry drawing medium executed with fragile, finger-size sticks. These drawing crayons, called pastels, are made of powdered pigments combined with a minimum of nongreasy binder, usually gum tragacanth or, from the mid-20th century, methyl cellulose. Made in a wide range of colour values, the
The Surprising History of Pastels - Streamline Publishing
Pastel - Wikipedia
Pastel - Wikipedia
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