Sky Blue Forearm Rest Kuan Ware Northern Sung Dynasty (A.D. 960-1126) Length 22.5cm The forearm rest is a common item of studio furniture whose function is to cradle the writer's arm so as to ease the strain of holding the wrist at the correct height while writing calligraphy. This celadon forearm rest in the shape of a semicircular section of bamboo is covered in warm, lustrous sky-blue glaze, and shows the marks of four firing spurs on the base.