Fig. 10 | Heritage Science

Fig. 10

From: Glass ornaments from southwestern Taiwan: new light on maritime glass exchange across Southeast, South and West Asia in the early-mid 1st millennium CE

Fig. 10

Bivariate plot of (a) CuO-SnO2 and (b) CuO-PbO showing the use of different copper-containing ingredients as colourants in the blue glass in the v-Na-Ca major and v-Na-Ca high Li sub-groups. (c) and (d): Lower concentration of the impurities related to the copper colourants can also be observed in the v-Na-Ca high Li sub-group than the v-Na-Ca major sub-group

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