Black glazes evolved from green glazes, and have the same coloring agent: iron oxide. Higher iron concentrations and reduction firing (low O2) at higher temperatures lead to beautiful ranges and mixes of deep blacks and rich browns.

Their first widespread use was on utilitarian wares in the 6-700s, and by the 11-1200s black glazes had branched and evolved into multiple decorative techniques, like oil spot and hare’s fur. Khmer and Burmese ceramics relied on black glazes starting in the 11-1200s, and they remained popular for hundreds of years as with the Burmese martaban jar here.