Chemical Composition: ICP-MS/AAA data from sample, Bronze:
Cu, 86.23; Sn, 13.41; Pb, 0.09; Zn, 0.004; Fe, 0.13; Ni, 0.07; Ag, 0.07; Sb, less than 0.05; As, less than 0.10; Bi, less than 0.025; Co, less than 0.01; Au, less than 0.01; Cd, less than 0.001
J. Riederer
Technical Observations: The patina is brown and red. Much of surface is a polished black, probably a modern patination or paint layer. The hollow interior is green with underlying red corrosion products.
Mechanical cleaning has removed all green corrosion products from the exterior, revealing red corrosion products and bare metal surfaces. The original surface has been fairly well represented in this process, which also included some smoothing and polishing to enhance the appearance. Black coloration was added, probably to hide areas of bare metal, but these areas have re-emerged. There are brittle manufacture losses on both ears and one horn. The other horn is lost except for a small portion of its base, which remains in its socket. Adhesive and brown paint around the remaining horn indicate that it may have been loose.
Wax drip marks in the interior indicate the head was made by the indirect lost-wax process, with the wax model having been produced in a mold. Additional, finer drip marks on the interior at the two horn locations may indicate that the horns were cast-on. A recessed area at the bottom edge of the neck would have connected to the vessel, and a small portion of the vessel remains attached to the proper left side of this join. There is evidence of six pins used to secure the join at the front of the neck, and there are probably others located around the entire circumference. Two of the pins are intact and measure 3 mm in diameter. The bull’s hair and facial features are refined and were probably enhanced after casting by cold working.
Henry Lie (submitted 2012)