Underdrawing is a preparatory drawing done on a painting ground before paint is applied, for example, an imprimatura or an underpainting. Underdrawing was used extensively by 15th-century painters lik
Anna Bilińska-Bohdanowicz, Self-portrait, 1892, National Museum in Warsaw. Unfinished portrait showing underdrawing.
Jan van Eyck, Saint Barbara of Nicodemy, oil on panel, dead paint or underpainting that was not further finished apart from the aerial party.