3D models: BU-072, EAP-flake & WEM-60

These 3D models were produced with an AICON smartSCAN-HE R8 from the manufacturer Hexagon (software version OptoCat 2018R1), featuring a blue light LED and two black and white cameras with 8 megapixels each. The S-150 FOV used has a point-to-point distance of 33 µm. After scanning, the 3D models (STL files) were edited in the free software GOM Inspect 2018 (2018 Hotfix 2, Rev. 111729). The scanning took place at TraCEr, Laboratory for Traceology and Controlled Experiments at MONREPOS Archaeological Research Centre and Museum for Human Behavioural Evolution, RGZM, Neuwied, Germany.

The 3D models have been used in 3D-EdgeAngle: A semi-automated 3D digital method to systematically quantify stone tool edge angle and design. For more information see ZENODO LINK XXXX & Protocol link XXXX

BU-072:

3D model of an archaeological tool (co-called Keilmesser) from the Upper site of Buhlen, Germany. The artefact dates to the Late Middle Palaeolithic. The archaeological finds from Buhlen are normally stored and displayed at the Hessisches Landesmuseum in Kassel, Germany (https://museum-kassel.de/de/museen-schloesser-parks/hessisches-landesmuseum). For more information about the artefact see:

Schunk L. Understanding Middle Palaeolithic asymmetric stone tool design and use:  functional analysis and controlled experiments to assess Neanderthal technology Verlag des Römisch- Germanischen Zentralmuseums Mainz. https://doi.org/10.11588/propylaeum.1076

EAP-flake:

This object is an experimental elongated laminar flake. The raw material is Baltic flint. One edge of the flake is retouched in the distal part. The retouch is applied on the dorsal face and is performed marginally, i.e., little invasive.

WEM-60:

The third item is a 3D model of a calibrated standard angle (gauge block) made of certified steel. The gauge block has a certified nominal value of 60 degrees and is coated with oil to avoid corosion. Note that for WEM-60 some extra target marks on the sample were needed to make the aligning between the singal scans possible. Thus, adhesive paper tags with symbols were placed on the calibrated standard angle. Despite ungreasing the metal surface of the sample, the adhesive paper tags showed a tendency to peel off after a period of time.