Black Pottery Jar with Double Rings

Black pottery was fired in a strongly reducing atmosphere (lacking oxygen); during the last stage of firing the fire was extinguished, the kiln closed and water poured from the top chimney and the carbon element from the fuel infiltrated the ceramic wall through the steam. Longshan is a Late Neolithic culture. It was named after Longshan village, Zhangqiu county, Shandong province where it was first recognized in 1928. The vessel was made on a rotating wheel, a method which became common during the Longshan culture; vessels became thinner than before.