Black Clay Bole for use in water gilding techniques. Use over traditional chalk gesso ground. Traditionally Black Bole has been used under Silver Leaf or White Gold. The stark contrasting black creates a deep surface to maximize the cool nature of the Silver leaf and White Gold. Bole needs to be applied with a solution of rabbit skin glue. This Bole is manufactured by Sinopia. The formula was developed by working with master gilders to craft a rich creamy bole that burnishes to a beautiful highly reflective luster.