3D printing is often also referred to as additive manufacturing. 3D printing units in India make three dimensional solid objects from their digital files. 3D printing follows the additive process, in which an object is created as successive layers of material are laid down until the entire object is created.
It begins with the creation of a virtual design of the object that you want to create. Made in a CAD (Computer Aided Design) file using a 3D modelling program (for making a totally new object) or with a 3D scanner (to copy an existing object), the virtual design is the basis for 3D printing a replica / new object.