I am currently revisiting the literature before we start on our collection of antique bottle fragments. In particular a 2002 paper called “Weapons and wunan: production and exchange of Kimberley points” (Akerman, Fullager and van Gijn) as on page 22 it outlines a very detailed but concise reduction sequence. Essentially, for bottle fragments the most energy is spent flattening the curved inner surface. Consequently this inner face is flaked from either side, in turn, until flat. The above photo is of a point within the Manchester Museum collection and illustrates this description excellently. This process ‘sets up’ the upper or dorsal surface for the next phase of removals. This involves a single series of flakes being taken from each edge.
This is what we see on the dorsal face above, and I think this is one facet that gives these points their characteristic look. Only then is the edge serrated or notched and the tip worked. This example doesn’t have the needle like tip and is what gave me the notion that larger ones may have been used as knives. Returning again to the ventral surface, what we can see in the photo is an almost plano-convex cross section as opposed to lens shaped. Finally, it would take an aboriginal knapper about 45 minutes to make a 200mm long point. This would be a very large point indeed. The overall approach outlined above is the one I am going to take with our period materials, although it may take me a little longer than 45 minutes 🙂
Akerman, K., Fullagar, R. and van Gijn, A., 2002. Weapons and wunan: production, function and exchange of Kimberley points. Australian Aboriginal Studies, (1), pp.13-42