Note 2 — PREFACE TO THE WHOLE WORK

The process of sgraffito work is described in Professor Baldwin Brown's notes to "Vasari on Technique" as follows: "A wall is covered with a layer of tinted plaster, and on this is superimposed a thin coating of white plaster. This outer coating is scratched through (with an iron tool), and the colour behind is revealed. Then all the surface outside the design is cut away, and a cameo-like effect is given to the design."