Method and device for layer-wise producing a three-dimensional object from a powder material

There is provided corresponding positions by the action of electromagnetic radiation (7a) to the to the cross section of the object (3) in the respective layer, a method for producing a three-dimensional object by selective solidification of layers of a powdered material (3a), wherein the powder is a polymer powder , preferably a polyamide is used, is subjected in the non-solidified powder (3a ') after the production of the object to a treatment with water or steam at elevated temperature, is then dried and is then further used to construct a new object.