Benvenuto Cellini, The treatises of Benvenuto Cellini on goldsmithing and sculpture (1898)
“ These small pieces must be made with great care; and while the gesso is moist you fit into each of them an iron wire bent double, and projecting out of the gesso much like a little ring, so as to be capable of holding a thread through it. Each time that one of these small pieces is finished it must be tested, and you must see if you get a good impression from it & if the piece relieves. ”
