3 ms·

3D printers make shapes, not substances.

• ben_w 6y ago
  In principle — and this would be a bad idea even just for the safety of the person running the printer — you could have a multi-head printer deposit powders of charcoal, potassium nitrate, and sulphur in the same internal void while printing in a more conventional material. I don’t know of any four-head printers, and even if they exist this is a bad way to make gunpowder, but in principle it could be done.
• LatteLazy 6y ago
  That's what I thought, the article seems to be nonsense...