Lead-tin-yellow is known in two different forms. Lead-tin-yellow type II contains silica and pure tin oxide.
Manufacturer / product code: Kremer / 10120
Chemical description: lead and tin oxides, with the inclusion of free tin oxide and silicon (quartz). Kremer PDF
Color Index: N/A
More info: Pigments Through The Ages Colourlex
DOWNLOAD paper: “FORS spectral database of historical pigments in different binders”