the invention relates a powder material consisting of coated particles for a powder - based rapid generative prototyping methods , in particular by compressing a 3d binder . said powder material consists of individual plastic , metal and / or ceramic particles and / or granules . a coating essentially consists of an adhesive agent which can be activated by a liquid binder , light or laser light , and of sinterable or glass - forming fine - grained material . said invention also relates to a method for compressing 3d binder with the aid of an organic solvent having a water content less than 45 % and to sintered bodies , in particular for moulding or precision mechanical engineering , which are fixed to each other by sintering or glass formation from a fine grained material .