Fig. 7

Details from photogrammetry and CT scans for the bead KH1. A Direction of the rotation of the mandrel during bead formation and decoration. Start point and end point of the decoration are marked. B Surface of the bead from the photogrammetric model: the circle marks the traces left by a tool used to remove the bead from the mandrel. C Size distribution and shape of the bubbles in the reconstructed CT volume (colors of the bubbles depends on their size). D Axial CT slices highlighting peculiar directions and shapes of the bubbles also grooves protruding into the base glass (see text for details). E Chain of seeds (very small bubbles) created by the processes for shaping the bead into a cube and the mark of deep incision. F Deformation of the chain of seeds by the tool used on the edge of the cubic bead