Lea Stein Teapot Brooch (Vintage)Vintage 1960s Celluloid and plastic layered Lea Stein, together with her husband, Fernand Steinberger, developed a technique of layering and laminating extremely thin sheets of celluloid acetate. The multi dimensional pieces were then baked for long periods of time, cooled, and cut into shapes a painstaking process that could take up to six months to complete Each teapot has slight discoloration