Ordinary printers used in daily life can print flat objects designed by computers, while the so-called 3D printers are basically the same as ordinary printers, but the printing materials are somewhat different. The printing materials of ordinary printers are ink and paper, while the different "printing materials" such as metal, ceramic, plastic and sand equipped with 3D printers are the real raw materials. After the printer is connected to the computer, the "printing material" can be superimposed layer by layer through computer control, and finally the blueprint on the computer becomes a real object. In layman's terms, a 3D printer is a device that can "print" real 3D objects, such as printing robots, printing toy cars, printing various models, and even food. The reason why it is popularly called "printer" refers to the technical principle of ordinary printers, because the process of layering is very similar to inkjet printing. This printing technology is called 3D printing technology.
There are many different techniques for 3D printing. They differ in the way materials are available and are built in different layers to create the part. Commonly used materials for 3D printing include nylon glass fiber, durable nylon material, plaster material, aluminum material, titanium alloy, stainless steel, silver plating, gold plating, rubber material, etc.