Northern Song (960-1127)
3.3 cm in height, 13 cm in mouth diameter, 8.9 cm in bottom diameter
This porcelain tray (for washing writing brushes) without any decorative pattern is a product of the Ru Kiln. By adding agate to the glaze, a quietly elegant color of reddish black is obtained, which is a characteristic of Ru ware. As the kiln was in production for only 20-odd years, very few Ru pieces have been handed down to this very day.