3D printers deposit thin layers of filament on top of each other that then fuse to form a 3D object. Also known as additive manufacturing, the 3D printing process is commonly used for making product prototypes, molds, tools, and custom parts. Filaments are available in a range of colors and materials. 3D-printing accessories such as build plates, build sheets, and build tape are used with 3D printers to improve speed and efficiency during printing processes.