Note 277 — Chapter XVIII · (XXXII.)
Louisa S. Maclehose translation
That is, the space where the yellow leaf is to come may be cleared of the red film after the yellow leaf has been painted on the back, as well as before that process. The process Vasari describes of introducing small details of a particular colour into a field of another hue is a good deal employed by modern workers in glass, but it was not known to Theophilus, or much used in the palmy days of the art, the twelfth and thirteenth centuries.