Same procedure as the last lot, except using my metal pressure flaker on some very hard flint. Again, I selected a pre-thinned piece, a blade produced by John Lord, of which I have about thirty. I took all the thick bits off with a stone, and then pressure flaked the shape. I am using Chris Butler’s (2005) book Prehistoric Flintwork for the relevant shapes and sizes and this is a useful exercise. I am learning about the flintwork from different periods by making the stuff. This flint was particularly difficult to work. I had an obsidian preform that I reduced and that was like soft glass, easy to work. This flint felt ‘dry’ and hard to work. Even with my favourite pressure flaker my invasive thinning was limited to 7 or 8mm maximum. When making it I made sure the thick section was the point and the thinner section could be the base, and therefore easily notched. And so it transpired. I am churning about two out per day at the moment, not sure what has come over me?
I have some workshops planned aimed at primary school children studying the prehistory of Britain. Following the theme of this blog, one of the activities is to bring together the components necessary for the kids to make a Bronze Age arrow. Rightly or wrongly, I am a little cautious about letting small children loose with flint or glass arrowheads so I thought I would get some 3D prints. The flint originals were a Neolithic leaf shaped example and a Bronze Age barb and tang arrowhead both produced by John Lord for Elizabeth Healey’s teaching collection . These originals were scanned in by a colleague Tom O’Mahoney.
Tom also scanned one of my glass barb and tang arrowheads to see how the scanner would cope with a reflective and transparent material. This example had to be covered in talcum powder before scanning.
After scanning, two prints of each of the flint versions was produced for me by Ed Keefe from the print unit at Manchester Metropolitan University (ManMet).
The first two examples on the left have some horizontal lines running across. Ed described this as similar to when a photocopier is running low on toner. Consequently he printed them again in the more transparent material. The second two are excellent ‘plastic’ reproductions of ‘original’ flint reproductions. However, the most impressive aspect is the price. Because prints are priced by the cubic centimetre each arrowhead worked out at £2.50. Full colour versions would have cost £3.50. My scans can be uploaded to sites such as Sketchfab or Thingiverse and therefore downloaded free of charge by teachers with the print costs being minimal.
The workshops are still at the planning stage, but I have been impressed by the results and the prices for this process. I would certainly recommend the 3D print facility at ManMet to anyone who thinks the process may be useful to them. Ultimately though, it depends what the kids think!