The consumables for 3D printers are PLA, ABS, photosensitive resin (liquid), wax-based materials, nylon powder, gypsum-like powder, 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. The melting point, hardness and strength of each material are different. Different 3D printers use different materials for printing. Generally speaking, the printing cost of 3D printers is generally compared. high. In general, FDM technology uses more PLA and ABS; photocurable molding uses more photosensitive resin or wax-based materials; nylon powder and metal powder use laser sintering more; in general, it is additive Manufacturing.