Stereolithography (SLA) is a type of 3D printing technology that uses a laser to solidify a liquid resin into a 3D object. The process begins with a 3D model that is created using computer-aided design (CAD) software. The model is then sent to the SLA printer, which uses a laser to cure (harden) the liquid resin one layer at a time, building up the object from the bottom up.

SLA printing offers high precision and accuracy, making it popular for creating detailed, intricate parts and prototypes. The cured resin produces a smooth surface finish, making it ideal for creating models that require a high level of detail, such as jewelry, dental appliances, and medical devices.

One of the main advantages of SLA printing is that it can produce parts with a high level of detail and accuracy that are difficult to achieve with other 3D printing technologies, such as FDM. However, the process is generally slower and more expensive than FDM printing, and the materials used are typically more expensive as well.

SLA printers typically use photopolymer resins, which come in a variety of colors and properties, including flexible, clear, and high-temperature resistant resins. The cured parts are also typically stronger and more durable than those produced with FDM printing, which makes SLA printing a preferred method for creating end-use parts and products.