3D printed models as replacement for fragile fossils in travelling exhibitions

Display of fossils in museum exhibitions bears a great value in teaching the public about various aspects of earth history. However, fossils integrated in exhibitions face the risk of being damaged, especially through frequent handling, as for example in travelling exhibitions. In addition, when on display for years, fossils are not easily accessible for research purposes.

The recently conceptualised and implemented travelling exhibition Molassic Park deals with the fossil record from the Miocene Upper Freshwater Molasse of southern Germany and its ecological interpretations. The included mammal remains are in most cases unique with two type specimens and are very fragile. In order to avoid damage and research-restriction effects, the curator decided on replacement by 3D printed models.

Ca. 30 fossils were surface-scanned with blue-light technology using the precision 3D hand scanner Space Spider of Artec 3D. Virtual 3D models were calculated in Artec Studio 17 and 3D printed with an FDM printer. In preparation for colouration with acrylic paint, visible extruded material steps were covered with beige acrylic paint thickened with aerosil.

We found that printed 3D models are a much more gentle alternative to the objects than making traditional moulds and casts, and visitors receive a realistic impression of the fossil evidence. Hence, printed 3D models are a suitable replacement of real fossils in travelling exhibitions.