3-D PRINTING 

       It is basically process of making 3-D objects of any shape virtually defined using computer The process mostly rely on the removal of material by  cutting or drilling. To perform a print, the the design has to be loaded in machine (.stl file) after loading  it lays down successive layers of liquid, paper and other things  to form a object.

       This major advantage of this printer is time saving : if you want to make any model it will take days probably weeks. but this 3-D printing technology may take only hours (in worst case). This technology will be very useful for commercial purposes. The model must be created in CAD or any other specific modeling software (i don't know exactly which software) then it is loaded in printer.