Consumables for 3D printers include PLA, ABS, photosensitive resin (liquid), wax-based materials, nylon powder, gypsum-like powder and metal powder (including stainless steel, titanium alloy, iron-nickel alloy, cobalt-chromium alloy, etc. There are many kinds of materials, such as photosensitive resin and wax-based materials, and each material has different melting point, hardness and strength. Different 3D printers use different materials to print. Generally speaking, the printing cost of 3D printers is generally high. Generally speaking, PLA and ABS are widely used in FDM technology, and many photosensitive resins or wax-based materials are used in stereo lithography equipment. Nylon powder and metal powder are more sintered by laser; Generally speaking, it belongs to additive manufacturing.