3D printing and laser forming technology, using a layered processing, overlay molding to complete the 3D entity.
Each layer of the printing process is divided into two steps, the first in the need to spray a layer of special area of glue, glue droplet itself is very small, and is not easy to spread.
Then it is sprayed with a layer of uniform powder, the powder encountered the glue will quickly cured bonding, while the region is still loose without glue. In such a layer of glue layer of powder, the solid model will be "printing" molding, printing is completed, as long as the loose powder can be "planed" out of the model, and the remaining powder can be recycled.