This 3d printing system is designed to be used by design engineers and other professionals in the production of early-stage 3D appearance models and prototypes. It is based on the Massachusetts Institute of Technology’s patented 3DP (3D Printing) technology. The software first converts a three-dimensional design built using 3D CAD into cross-sections or slices that can be between 0.0035” – 0.004” (0.0875 – 0.1 mm) thick. The printer then prints these cross-sections one after another from the bottom of part to the top. Inside the printer there are two pistons. To begin the 3D printing process, the printer first spreads a layer of powder in the same thickness as the cross section to be printed. The print heads then apply a binder solution to the powder causing the powder particles to bind to one another and to the printed cross-section one level below. The feed piston comes up one layer and the build piston drops one layer. The printer then spreads a new layer of powder and repeats the process, and in a short time the entire part is printed.