In one part of the state of Oaxaca, potters have been making black clay containers in the same way for centuries.

VOA: special.2009.09.09

Ron Rivera,a ceramics artist and activist in the group Potters for Peace, saw it and recognized its value.

VOA: special.2009.06.22

Later,potters developed heated devices called kilns to control the necessary firing conditions.

VOA: special.2009.09.09

Potters add water to soften the clay.

VOA: special.2009.09.14