As far as the hacker’s toolbox goes, the 3D printer is way up there in terms of utility. Sure, it takes time to learn the ins and outs of designing, slicing, and extruding, but after that, the world ...

That process in turn utilizes a technique known as sand casting, in which molten metal is poured into a mold made of sand and a bonding agent such as clay. In this case, an inert gas is then pumped ...