Label Copy: Sancai, or tri-color glazed ware, was one of the most brilliant innovations of Tang dynasty (618 - 907) potters and the dramatic "peacock feather" design on this robust funerary jar demonstrates the expressive power of the glaze. By adding colorants to the lead glaze solution---copper oxide for green, iron oxide for amber and brown, antimony for bright yellow, and cobalt oxide (newly introduced from Persia) for blue---the basic "three-color" sancai palette was achieved. Glazes using lead as the fluxing medium are fluid and tend to run together, producing random splashes, dribbles, streaks and sometimes a muddy disaster. More often vivid colors and bold designs resulted.