A process for the preparation of filigree investment castings, as well as ceramic investment material for this purpose,

摘要

Investment material for the production of casting moulds for the preparation of highly precise castings for the medical technology, comprising one or more refractory oxides as well as a binder system, wherein the binding system magnesium oxide and ammonium - dihydrogen phosphate, characterised in that the binder system one or more inorganic acids are added, selected from the group comprising: nh₂So₃H, nh₄Hso₄ and p₂O₅.