Prior to engraving or polishing gold leaf, at Pigmentti, we get ready the operate with sixteen layers of Gesso Bologna, 8 layers of bole right before last but not least water gilding. Water gilding is employed to achieve a mirror end on glass, but is also applied on bole (clay) https://zanderevjxi.thelateblog.com/22319720/the-basic-principles-of-gold-leaf-gilding-supplies