File:SEM analysis of reverse of Roman mirror (FindID 745948).jpg
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Captions
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Summary[edit]
| SEM analysis of reverse of Roman mirror | |||
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| Photographer |
Lincolnshire County Council, Adam Daubney, 2015-10-16 10:14:34 |
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| Title |
SEM analysis of reverse of Roman mirror |
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| Description |
English: A Roman copper-alloy hand mirror. The mirror is circular, measuring 12cm in diameter, and fits comfortably in the hand. The reverse is decorated with five concentric circles of varying thickness separated by deep channels. The inner circle measures 3.2mm in thickness and has an interior opening of 2mm diameter. The next rim is located 9mm out from this, and is 3mm in thickness. The next rim is located 5.2mm out from this, and measures 66mm in thickness. These three rims all have vertical sides that rise 4mm from the base. The next rib is angled so that it slopes diagonally away from the centre. The rim is 4mm away from the one before it, and has a thickness of 2mm. The next rim is located 5.2mm away from the one before it, and has a thickness of 3mm. This rim has vertical sides rising 2.2mm from the base. A flat, wide band runs around the perimeter; this measures 15mm in width. The mirror has a thickness of 5mm over all.
The front of the mirror has a convex surface with an out-turned rim. The convex surface measures 10mm diameter and rises about 2mm in the centre. The mirror has a dull green-brown patina with extensive areas of pitting and bright green corrosion. On both sides patches of smooth, darker coloured, surface patina are visible, and SEM analysis confirms these areas to be tin. The presence of tin on both sides of the mirror indicate that it was tinned all-over. High magnification of the tinned area on the convex surface shows very regular, linear polishing marks, set at right angles. This mirror appears to to fall into Lloyd-Morgan's Group E mirrors which are characterised by a simple decoration of turned concentric patterns on the underside (Lloyd-Morgan 1977: 212-220). Many of these show evidence for tinning. On the Continent they have a frontier-distribution, and are thought to have been made in Trier or Cologne, or both (ibid.). They date to the third century AD (Lloud-Morgan, G. 1981, 'Roman mirrors and the third century', in A. King and M. Henig, The Roman West in the Third Century: Contributions from Archaeology and History (BAR Int. Series 109), pp.145-157m pl.9.1. |
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| Depicted place | (County of findspot) Lincolnshire | ||
| Date | between 200 and 300 | ||
| Accession number |
FindID: 745948 Old ref: LIN-0B4401 Filename: EDXTinlayeronReverse1.jpg |
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| Credit line |
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| Source |
https://finds.org.uk/database/ajax/download/id/536879 Catalog: https://finds.org.uk/database/images/image/id/536879/recordtype/artefacts archive copy at the Wayback Machine Artefact: https://finds.org.uk/database/artefacts/record/id/745948 |
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| Permission (Reusing this file) |
Attribution License | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:43, 19 February 2019 | | 3,240 × 2,194 (1.66 MB) | Fæ (talk | contribs) | Portable Antiquities Scheme, LIN, FindID: 745948, roman, page 5449, batch count 1146 |
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