3D printing is a set of additive manufacturing processes that creates physical objects from digital models one layer at a time. Unlike traditional manufacturing techniques (casting, drilling, machining, etc.), which tend to be subtractive in nature, 3D printing additively builds up an object instead of cutting it down from a larger block of material. While 3D printing dates back to the 1980s, the last decade has seen swift growth and excitement in the sector across the globe. As the various printing approaches improve and the materials palette grows, 3D printing is starting to move from just low volume, highly customized rapid prototyping applications to some final products and post-production customization.