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Description: | An incomplete cast copper alloy blade, of Middle Bronze Age dating (1500 CAL BC to 1150 CAL BC - Needham's Period 5).The blade fragment is sub trapezoidal in plan, and lentoid in cross section. The blade tapers towards either edge. The edges to the top and bottom are old, pre depostional breaks. No evidence of rivet holes are present at the top of the blade fragment. No decoration is present on either the front or back of the blade.It measures 62.34 mm in length, has a maximum width of 22.69 mm and a minimum of 14.43 mm. It is 2.82 mm thick in the centre of the blade and 1.06 mm thick along the blade edges. It weighs 11.6 g.The blade fragment is a mid to dark brown colour, with an even surface patina. The patina has been removed in a couple of areas, leaving a lighter green colour. These areas should be monitored for signs of active copper corrosion (bronze diseases) occurring. This would be a bright green powdery residue. To reduce the risk of this happening, the blade should be stored in a sealed air tight dry box, such as a tupperware box with a liquid seal, lined with acid free tissue and silica gel.
Original Image | Publisher: | http://finds.org.uk | Source: | Portable Antiquities | Identifier: | http://finds.org.uk/database/artefacts/r... | Go to resource |
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