This bowl uses a combination of two techniques that are hardly ever found together: overglaze enamels and piercing through the body. This rarity may well have been since the extra firing for the enamels would have placed a further strain on the now uneven body making it more likely to self-destruct in the kiln. The effect however, particularly in the centre where the piercing is under differently coloured glazes, is akin to stained glass and must have been highly prized.