Chemical Composition: XRF data from Tracer
Alloy: Bronze
Alloying Elements: copper, tin
Other Elements: lead, iron, silver, antimony
K. Eremin, January 2014
Technical Observations: The surface is bright metal with thin, irregular brown and black oxidation. There are no significant corrosion products present. The surface has a rough, pitted texture, which may be the result of a chemical treatment that could have stripped all corrosion products. It is also possible that the heat of a fire could have caused this appearance. The sheet is considerably warped. Viewed using a microscope, the edges show a degree of wear that gives the impression of age. A brown, granular residue in some of the inscribed lines is soft and fragile and does not give the impression of being related to manufacture or burial.
The hammer marks (1.0 to 1.5 cm in diameter) across the sheet indicate it was formed or at least finished by hammering. Smaller, elongated hammer marks are an effort to obliterate the first word of the inscription. A 1.5-mm oval-tipped chisel was used with hammer blows to cut the inscription, a process with would have removed a strip of metal during the cutting. Four V-shaped cuts (3 to 4 mm each) into the top of the proper left edge have no apparent function but could have somehow assisted in mounting the plaque. Residue of lead and lead corrosion products are present on all four edges. The lead was probably related to the original mounting. Small amounts of lead are also in and adjacent to the faint incised line, 1.5 cm from all four edges, that creates a border for the inscribed field.
Henry Lie (submitted 2011)