The document provides information about pastels including their origins in the 15th century and early use by artists like Leonardo da Vinci and Federico Barocci. It notes that Rosalba Carriera was the first artist renowned for her pastel portraits in the 1700s. Later, artists like Degas championed pastel, raising it to the brilliance of oil paint. The document also describes the composition of pastels, types including soft and hard pastels, techniques for working with them, and surfaces used.