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Scanning Electron Microscopy image of a sample printed in horizontal orientation (sample #03): (a–c) Merged internal voids of an obloid shape, 50–75 µm in length, form at the interface between raster angles changes; (d–f) The exterior surface of the part shows micro-voids formed during the heat treatment at the interface between the sample wall and the supporting powder. These voids are 5–10 µm in size.
