Cellulose Acetate (aka Acetate) is, like Celluloid, a semi-synthetic plastic based on natural polymer cellulose, obtained from wood or cotton. This material was a technical evolution on Celluloid, that was too flammable. These bangles show a variety of production techniques, like lamination of different colors and patterns, slicing in different angles to obtain varied patterns, lathe turning and machining, compression molding and cutting. All these processes were very much manufactured, that is, made in great part by hand. Cellulose acetate plastics were also suitable to automatic production in huge quantities by the process of injection molding, resulting in objects that lack this crafts like quality.