Painting Materials: A Short Encyclopaedia - Rutherford John Gettens, George Leslie Stout - Google Books

https://books.google.de/books?id=bdQVgKWl3f4C&pg=PA157&dq=Smalt#v=onepage

The combined training and experience of the authors of this classic in the varied activities of painting conservation, cultural research, chemistry, physics, and paint technology ideally suited them to the task they attempted. Their book, written when they…