FTP name this ground color pigment mixed with water and  a binding medium, a chalk-like crayon.
Particularly associated with the art of the Rococo, but popularized again by the Impressionists, this medium  became the specialty of Maurice-Quentin de la Tour after it was introduced to France by Rosalba Carriera. The  colors are typically luminous, shading is subtle, and forms are modulated with a hazy soft focus; the medium is  especially suited to quick execution and sketching. FTP name this ground color pigment mixed with water and  a binding medium, a chalk-like crayon.
Particularly associated with the art of the Rococo, but popularized again by the Impressionists, this medium  became the specialty of Maurice-Quentin de la Tour after it was introduced to France by Rosalba Carriera.
Pastel