Ordinary printers used in daily life can print flat objects designed by computer. The 3D printer works in the same way as a normal printer, except printing materials. The printing materials of ordinary printers are ink and paper while the 3D printer is equipped with a variety of raw materials such as metal, ceramic, plastic, sand, etc. After the printer is connected with the computer, the "printing materials" can be layered by computer and finally the blueprint on the computer becomes real objects.
Popularly speaking, 3D printer is a device which can "print" real 3D objects, such as robot, toy car, various models, and even food.
The reason of commonly calling it "printer" refers to the technical principle of ordinary printers. The process of layered processing is very similar to that of inkjet printing. This printing technology is called 3D stereo printing technology.
There are many different technologies for 3D printing. They differ in creating parts with available materials and different layers. The common materials for 3D printing are nylon glass fiber, durable nylon material, gypsum material, aluminum material, titanium alloy, stainless steel, silver plated, gold plated, rubber material,etc.