"Boule” Work
A method of decorating furniture with inlays of brass or tin and tortoiseshell originated by André Charles Boule, came into vogue. The sheets of metal and shell were placed together and cut simultaneously, with the result that the patterns produced were interchangeable—thus the metal pattern could be fitted with a tortoiseshell background and vice versa. There was a tendency for this style of work to become more ornate and showy, and later, instead of the transparent shell being used in its natural colour, either vermilion or gold leaf was placed underneath.