It is a process of making 3-dimensional solid object from a digital file 3D is shorthand for three-dimensional. When you print a page on a printer, there are only two dimensions: the front of the page and the back of the page. Three-dimensional printing adds a third dimension, volume. 3D printing uses a printer to create three-dimensional objects, for example, a cup or doll or phone case and replaces the wax models . This technology is currently used in many fields such as health, construction, food, engineering, aerospace, etc.