Tripod Censer in Underglaze
Red
Chingtechen Ware
Yuan Dynasty
(A.D. 1279-1368)
     Like blue-and-white, 
the manufacturing process 
for underglaze red belongs 
to the "underglaze painting" 
family.  Due to problems
with controlling the kiln 
temperature, Yuan dynasty
underglaze red is not pure 
red but tends towards a 
purplish grey.