Laser stereolithography (SLA) 3D printing uses liquid resins that are solidified into very fine layers by laser light to build the object. The resins are available in standard, ultra-resistant, flexible, castable versions. The 3D printing process adopted by a 3D printer SLA is such as to offer a very high resolution that allows to obtain smooth and accurate prototypes down to the smallest details. For this reason, the use of an SLA 3D printer is suitable for printing models of jewelery, costume jewelery, goldsmiths as well as dental models.