3D printing in DLP (Digital Light Processing) uses a photopolymer (resin). This is processed with light into a solid product by a sort of small beamer. This projects the entire contour on the surface of the photopolymer in one go, this surface cures and the surface raises one layer. The next layer is then exposed and cured. DLP works with very thin pillars that support the overhanging parts of the model. These pillars can be easily removed after printing.
DLP printing is interesting for 3D printing in the medical industry for example. There are a large number of materials available that are suitable for coming into contact with the body (bio compatible). The high shape and size accuracy and the excellent surface quality makes the technique suitable for the jewelry industry but also precision models in the industry.