سینوپیا

Also known as sinoper

thumb|A sinopia showing a king, from the Museum of Sinopie in Pisa, [[Italy. ]] thumb|The sinopia—in this case, meaning the underpainting—of a painting of the Madonna and Child by [[Giovanni di Francesco Toscani ]] thumb|A sinopia for a fresco by Buonamico Buffalmacco (1290-1341), in the Museum of Sinopie in Pisa Sinopia (also known as sinoper, named after the now Turkish city Sinop) is a dark reddish-brown natural earth pigment, whose reddish colour 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