1) Iron oxide pigment 2) Ocher 3) Ochre 4) Shade of red 5) Sinoper 6) Sinopis 1) Sinoper 2) Sinopis 
Sinopia (also known as sinoper, named after the Turkish city Sinop) is a dark reddish-brown natural earth pigment, whose reddish color comes from hematite, a dehydrated form of iron oxide. It was widely used in classical antiquity and the Middle Ages for painting, and during the Renaissance it was often used for the cartoon or underpainting for a ...
preparatory drawing for a fresco; reddish-brown colour
• (n.) Alt. of Sinopis
(from the article `drawing`) ...the final execution down to exact details. They may also be mere probing sketches. Long before the appearance of actual small-scale drawing, this ... Sinopia, the preliminary sketch for a monumental wall painting, was done with the brush and has all the characteristics of a preparatory, ... [2 related ...
A red-brown chalk employed for marking-out frescos.
A red-brown chalk used for marking-out frescoes; also the preliminary drawing itself.