Jar with Cover, 1100s. The beauty of Jun ware lies in its spectacular glaze effects, which provide immediate visual appeal. The glaze that is thickly applied onto the heavily potted body also lends the vessel a sense of volume. As shown here, its glaze colours range from soft milky-blue to rose-purple. The purple suffusions are created by splashing or brushing copper-rich pigments onto the glaze before firing. The merging of purple splashes with opalescent blue glaze displays rich tonal variations, resembling purplish glows at sunset.