Method for producing a stereolithographic resin powder apparatus for producing three-dimensional object, and the three-dimensional object

A good recyclability, it is possible to pack the particles more densely, thereby enhancing the tensile strength of the three-dimensional object obtained by improving the orange peel property, good complex and fine three-dimensional object easily and efficiently providing for stereolithography resin powder can be produced. Comprises particles of A pillar, ratio of the height to the bottom diameter or the long sides of the columnar body of the particles, not more than 2-fold 0.5-fold or more, 50% cumulative volume particle size of more than 5μm and at 200μm or less, and a volume average particle diameter / number average particle diameter of stereolithography resin powder is 2.00 or less. Said particles are substantially cylindrical body, said generally have a diameter of 5μm or more 200μm or less in the bottom of the cylindrical body, and whether the height is 5μm or more 200μm or less, or the particles are rectangular, the bottom surface of the rectangular parallelepiped each side is at 5μm least 200μm or less, and a height aspect like is preferably 5μm or 200μm or less. .BACKGROUND