Resin for solid or hollow 3D printing of full and partial dental models as well as models with removable dies. Suitable for duplicating with silicone or gel and for fabricating splints, aligners, and more using the thermoforming technique. Optimal visibility of all model contours and preparation margins, due to the opaque gray color of the models. Suitable for processing in DLP 3D printers with a wavelength from 385nm to 405nm. Easy and error-free to process: high physical stability minimizes sedimentation during storage and facilitates mixing.