In addition to the three standard states of matter, namely solids, liquids, and gases, there is also a fourth state called a plasma. Plasmas are particularly interesting for their unique real-world applications, one of which is the plasma cutter. These metal-cutting devices harness the power of thermal plasmas to quickly and accurately slice through sheet metal. In this post, we delve into the world of plasma cutters: First, we define what exactly a plasma state consists of and the different types that exist. Then we investigate how plasma cutting machines work and the components involved. Finally, we spell out the steps taken to operate these metalworking devices.