3D printing or additive manufacturing has revolutionized the way of thinking and carrying out design because it frees us from the constraints and limitations of traditional manufacturing technologies. Over the years, the material portfolio has grown considerably, offering a varied range of polymers that are suitable for a range of applications. This was possible thanks to the parallel development of different production technologies, each with its own characteristics. The most common and interesting materials, such as PA12 nylon, are facilitating the transition of the use of these technologies from conceptual and functional prototyping tools to real production technology capable of meeting all the requirements of final products produced in runs of thousands of components.