3D printing is a widely popular term these days, but only a few knows what this printing technique really is. Wikipedia says that 3D printing is an additive “process of making three dimensional solid objects from a digital model.” It can be used to make anything, from footwear to jewelry to cars.
3D materials are often made from the bottom up. The process depends on the kind of material—metal, resin, polymer, etc.—used and printer—industrial or commercial. Industrial 3D printers are often large and expensive but are a lot faster than commercial printers. They are used for rapid prototyping and 3D printed objects. Commercial 3D printers, on the other hand, are smaller and cheaper but slower and lower in resolution.