As of this week, you can pre-order a 3D printer that prints in carbon fiber (or fiberglass or Kevlar, if you prefer). The MarkForged Mark One printer is a novelty among the growing ranks of plastic-printing machines on the market, but founder and CEO Greg Mark thinks it’s an even bigger deal than you’d imagine: It will totally change how people think about carbon fiber.

Carbon fiber is made of long strings of carbon atoms formed by stacking sheets of graphene. It’s strong but flexible, and a good conductor of heat and electricity. However, it’s expensive and time consuming to work with, as, in its whole form, it can only be incorporated into objects by hand.

To fully appreciate the labor intensiveness of working with carbon fiber, watch this video of a cello construction:

Or skip to 3:40 in this video to see how GE builds jet engine blades:

The…