The new generative production resin Pro3dure GR-12.2 has been specially developed for the digital production of casting molds for the casting process of polyurethane shells. The Green-Flex modules ensure that the casting molds can be printed extra thin. The light translucency of the material gives the advantage of keeping a close eye on the filling process so that air entrapment and air bubbles can be avoided. The GR 12.2 is light blue in color and can be used very well with the SysTherm® Separator SPT-1.