Chemical Composition: 2007.104.3.A
Bust
XRF data from Tracer
Alloy: Mixed Copper Alloy
Alloying Elements: copper, tin, lead, zinc
Other Elements: iron, silver, antimony
Hook
XRF data from Tracer
Alloy: Brass
Alloying Elements: copper, zinc
Other Elements: lead, iron, silver
Fill of bust
XRF data from Tracer
Materials: lead, iron
2007.104.3.B
Chain links
XRF data from Tracer
Alloy: Mixed Copper Alloy
Alloying Elements: copper, tin, zinc
Other Elements: lead, iron, silver, antimony
Hooks and loops connecting chains
XRF data from Tracer
Alloy: Mixed Copper Alloy
Alloying Elements: copper, tin, lead, zinc
Other Elements: iron, silver, antimony
2007.104.3.C
Bar and hooks
XRF data from Tracer
Alloy: Mixed Copper Alloy
Alloying Elements: copper, tin, lead, zinc
Other Elements: iron, silver, antimony
K. Eremin, January 2014
Technical Observations: The patina of all three components is green to gray-green, with varying amounts of smaller dark green areas and small spots of brown burial accretions. The green is very compact and preserves surface detail. The empress weight is slightly grayer in tone, and this slight difference could be important in relating the three components. On the other hand, variations in the choice of alloy for the figural cast weight could easily have caused this difference. The dissimilarity between the color of the mixed copper alloy weight and the very dark brass hook connected to the single chain link at the crown stands out, and the hook could have been added at a later date or come from another object.
Most of the weight-bearing surfaces show a similar (and significant) degree of ancient wear. The retaining pin and ring for the third hook, now missing from the crossbeam, are made of iron rather than copper alloy, as in the other two, intact hooks. Perhaps this was a replacement (using a tougher, longer-lasting metal, although one more prone to corrosion) after the original copper alloy pin and ring failed. As suggested above, the flat profile hook attached to the weight, with its different patina, could also be a replacement, although possibly an ancient one. Its flat profile and sharp bearing edge are appropriate for precise measurement, and it would have seen the most aggressive and abrasive use of all the components, explaining the need to replace it during the original period of use. The lead and corroded iron inside the empress weight are intact and appear to be antique. The weight exhibits the dents and wear that would be expected from use.
The weight was cast, but areas of surface relief appear to have been enhanced with a file after casting. The chains were cold worked from a bronze rod, and the hooks and the crossbeam were probably cast as general shapes and then cold worked to receive their final shape and surface detail. Punches were used to make the scale markings on the crossbeam.
Henry Lie (submitted 2006)