[Studies on the setting behavior of dental gypsum. 1. Experimental characterization of the hardening process]

Using penetration tests, the authors studied the setting of dental gypsums (alpha- and beta-hemihydrate) under different conditions of processing (temperature of the mixing water, mixing time, addition of electrolytes). The suitability of penetrometry as a standardizable testing procedure for characterizing the setting process of gypsums is demonstrated and the effects of different materials and processing parameters on setting are discussed.