Making Glair Acording to Cennini Glair, or White of Egg was used in Medieval and Renaissance art, as a binder for paint in illumination, gilding, and even as a varnish. Cennino Cennini provides a recipe and multiple uses for it in his book, Il Libro dell’Arte, A Craftsman’s Handbook, written in ca. 1390 – 1437. […]