workshop was often family-operated. Lysias's shield manufacture employed 350 slaves; Demosthenes' father, a maker of swords, used 32. After the death of Pericles in 429 BC, a new class emerged: that of the wealthy owners and managers of workshops. Examples include Cleon and Anytus, noted tannery owners, and Kleophon, whose factory produced lyres. Non-slave workers were paid by assignment since the workshops could not guarantee regular work. In Athens, those who worked on state projects were paid one drachma per day, no matter what craft they practised. The workday generally began at sunrise and ended in the afternoon. Pottery The potter's work consisted of selecting the clay, fashioning the vase, drying and painting and baking it, and then applying varnish. Part of the production went to domestic usage (dishes, containers, oil lamps) or for commercial purposes, and the rest served religious or artistic functions. Techniques for working with clay have been known since the Bronze Age; the potter's wheel is a very ancient invention. The ancient Greeks did not add any innovations to these processes. The creation of artistically decorated vases in Greece had strong foreign influences. For instance, the famed black-figure style of Corinthian potters was most likely derived from the Syrian style of metalworking. The heights to which the Greeks brought the art of ceramics is, therefore, due entirely to their artistic sensibilities and not to technical ingenuity. Pottery in ancient Greece was most often the work of slaves. Many of the potters of Athens assembled between the agora and the Dipylon, in the Kerameikon. They most often operated as small workshops, consisting of a master, several paid artisans, and slaves. Trade Greece's main exports were olive oil, wine, pottery, and metalwork. Imports included grains and pork from Sicily, Arabia, Egypt, Ancient Carthage, and the Bosporan Kingdom. Maritime commerce The main participants in Greek commerce were the class of traders known as emporoi (). The state collected a duty on their cargo. At Piraeus (the main port of Athens), this tax was set initially at 1% or higher. By the end of the 5th century, the tax had been raised to 33 talents (Andocides, I, 133-134). In 413, Athens ended the collection of tribute from the Delian League and imposed a 5% duty on all the ports of her empire (Thucydides, VII, 28, 4) in the hope of increasing revenues. These duties were never protectionist, but were merely