tin oxide

Ingredients

tin oxide

Preparation Steps

Original Recipe Text

The white opacifier is composed of crystalline tin oxide (SnO2). In the examined samples, it was found in concentrations ranging from 1% to 8%. It was also identified in opaque yellow and green glasses where it likely served as a base for lead-tin yellow (p. 129-130).

Evidence

"Five glasses were found to be opacified with white crystalline tin oxide: the middle white layer in the cameo fragment and four multicolored beads (Table 1, no. 8). The tin content is rather low in these glasses, with tin oxide ranging from about one percent to about eight percent in one of the beads."

Remarks

Tin oxide was used not only for white opacity but also as a component in yellow and green opaque glasses. In the cameo glass fragment, the white layer is opacified with tin oxide, while the yellow and green beads analyzed contain lead-tin yellow (p. 131).