All are transparent, with the exception of tin or stanniferous enamel.
It has long been a subject of doubt whether or not Egypt possessed the secret of stanniferous enamel.
A great deal has been said of the reflet mtallique and stanniferous enamel, and notably of the discovery of the latter in Italy.
Both Luneville and St. Clement have been more recently known by their stanniferous faience.
Whether he used a plumbiferous, or lead glaze; or a stanniferous, or tin glaze, we do not know.
The earthenware vessels with stanniferous enamel, called in Italy sgraffiato ware, have been attributed to Città di Castello.