The experiment is being conducted by Building Bytes, who have already designed three styles of brick prints: Interlocking, Ribbed, Honeycomb and something they call the "X-Brick". Their method is to use a liquid ceramic air-pressure extruded from a standard personal 3D printer (which looks suspiciously similar to a BFB RapMan.)
But, you ask, why incur the lengthy delays 3D printing bricks when they can be made much faster using conventional approaches? The answer lies in the design of the bricks.
Read the Entire Article at Fabbaloo