An art history question !?

The black-figure period coincides approximately with the era designated by Winkelmann as the middle to late Archaic, from c. 620 to 480 BC. The technique of incising silhouetted figures with enlivening detail which we now call the black-figure method was a Corinthian invention of the 7th century and spread from there to other city states and regions including Sparta, Boeotia, Euboea, the east Greek islands and Athens.