- Wet spinning is the oldest process. It is used for fiber-forming substances that have been dissolved in a solvent.
- The spinnerets are submerged in a chemical bath and as the filaments emerge they precipitate from solution and solidify.
- Because the solution is extruded directly into the precipitating liquid, this process for making fibers is called wet spinning. Acrylic, rayon, aramid, modacrylic and spandex can be produced by this process.