A traditional gilding process, in which bole clay is applied to a substrate, and then moisture is used to activate adhesion for metal leaf application, and then the leaf is burnished with agate to bring out the sheen.
Water Gilded refers to a traditional and highly refined gilding process in which multiple layers of bole clay (a fine, colored clay mixed with animal glue) are applied to a substrate, typically wood. Once the bole is smoothed and polished, the gilder wets the surface with water or a water-based solution to temporarily reactivate the adhesive qualities of the bole. Metal leaf-most commonly gold leaf-is then laid over the moistened surface and later burnished with an agate stone to achieve a luminous, mirror-like finish.
