What is the reason why the ancient Greek red painting style pottery painting reached the highest level of ancient Greek pottery painting?

Ancient Greek red painting style pottery painting reached the highest level of ancient Greek pottery painting. This is manifested in the in-depth characterization of characters and the expression of artistic conception. Elmy Tashi Museum in Leningrad, Russia, painted Chun Yan's binaural pottery bottle and Munich Museum of Ancient Arts and Crafts painted Farewell to Soldiers, which can be regarded as the representative works of red painting style in pottery painting in this period.