The grisaille, in painting, is a pictorial technique synonymous with chiaroscuro, or chiaroscuro, as Vasari specifies it. It uses only shades of the same color to imitate marble, stone, bronze (fifteenth century). It is similar, by this principle, to the monochrome, in its variant with several tones of the same color. It has often been used to prepare, sketch, prefigure a final painting (like sinopia). It is also used in the stained glass technique, in gray, by adding metal oxides before firing the glass. A grisaille is a painting executed entirely in shades of grey or of another neutral greyish colour. It is particularly used in large decorative schemes in imitation of sculpture. Many grisailles include a slightly wider colour range, like the Andrea del Sarto fresco illustrated. Paintings executed in brown are referred to as brunaille, and paintings executed in green are called verdaille. A grisaille may be executed…