Manufacturing processes: Binder Jetting

Is a rapid prototyping and additive manufacturing technology.

A print head moves across a bed of powder, selectively depositing a liquid binding material. A thin layer of powder is spread across the completed section and the process is repeated with each layer adhering to the last. 

Parts printed using the binder jetting process are inherently porous and have an unfinished surface. Normally additional post-processing is needed. (curing, sintering, and additional finishing) For more info see: Binder jetting explained