undiaphanous

Updated: May 7, 2025

When the Materials of Glass being melted with Calcin'd Tin, have compos'd a Mass Undiaphanous and White, this White Amel is as it were the Basis of all those fine Concretes that Goldsmiths and several Artificers imploy in the curious Art of Enamelling.

Robert Boyle - Experiments and Considerations Touching Colours (1664)