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What laboratory analysis of Yoruba iron, glass and dye actually shows, including the Igbo Olokun glass which turned out to be made rather than imported, and how the reducing chemistry of an indigo vat and a soap ash lye works.

Archaeological, chemical, and historical evidence for primary glass manufacture and drawn bead production at Ilé-Ifẹ̀ between the eleventh and fifteenth centuries CE.

Archaeological, chemical, and historical evidence of primary glass synthesis and bead manufacture at Igbo Olókun in Ilé-Ifẹ̀ and its regional circulation.