This natural stone class 4 is often used for stump models, tdental arches, control models, master models for crown and bridge work and frame technology. This fine flowing, thixotropic gypsum has a particularly high hardness due to the very pure ingredients used. High scratch resistance, good edge stability and breaking resistance with low expansion are some of the properties that make this plaster very suitable for workpieces that require high precision. The recommended mixing ratio for this plaster is 100 grams on 20 ml of water. Then you get a processing time of 6 minutes and a setting time of 12 minutes. Schouten supplies the UltraDent super hard stones in the colors white, golden brown and green. Packages are available in the weights 4.5 kg, 10 kg and 25 kg.