Ultramarine is the most common blue inorganic pigment. It is compound with sulfur of aluminum silicate, having vivid lustre and pure colour.

• 凯乐福群青的出现，把中国群青提升了一大步，结束了中国群青质量几十年停止不前的局面，并将中国群青颜料推向一个崭新的阶段。