3D printing supplies are PLA, ABS,photosensitive resin (liquid),wax-based materials,nylon powders,gypsum-like powders, metal powders (including stainless steel,titanium alloys,iron-nickel alloys,cobalt-chromium alloys, 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 printer 3D printing supplies use different materials for printing。Overall,the current 3D printer printing The cost is generally high. In general,FDM technology uses more PLA and ABS;photo-curing molding uses more photosensitive resin or wax-based materials; nylon powder and metal powder use more laser sintering;in general,all are additive manufacture。
　　3D printer consumables PLA,ABS,for example:
　　1.PLA and ABS are printed by FDM melt deposition。In other words,it is a machine that accumulates manufacturing technology,ie rapid prototyping technology。It is a digital model file based on the use of special wax materials。Powdery metal or plastics, such as bondable materials, produce three-dimensional objects by printing a layer of adhesive material。
　　2. The principle of photosensitive resin 3D printers is based on the principle of photopolymerization of liquid photosensitive resins。The liquid material can rapidly undergo photopolymerization under the irradiation of a certain wavelength and power of the ultraviolet laser, and the relative molecular mass increases sharply,and the material also changes from a liquid state to a solid state。There are 3 kinds of commonly used metal powders:
　(1) A mixture of a metal powder and an organic binder is prepared by uniformly mixing the two powders in a certain proportion and performing laser sintering。
　(2) A mixture of two metal powders, one of which has a lower melting point, acts as a binder in the laser sintering process。
　(3) A single metal powder sintered to a unit, especially a high-melting metal, requires a melting temperature in a relatively short period of time. A laser with a large power is required。The biggest problem with direct metal sintering is that the porous structure is porous. The result is low parts density and poor mechanical properties。