This is one of the most ancient pottery techniques, first used in Sardinia in the pre-nuraghic period (2200-2000 BC), as demonstrated by several finds in the Anghelo Ruju necropolis in Alghero. In bucchero the earth turns black, as opposed to red, on account of the lack of oxygenation during firing. This phenomenon occurs due to the iron contained in the clayey mixture which, in the absence of oxygen, regains its natural blackish colour, accentuated by the carbon dioxide produced by the smoke from combustion.

ciotola cm.45-37-32.JPG