The ink stick is of rectangular form, carved on the edges with line and dot patterns, center gilt and depicts four characters surrounded by Eight Treasures, complete with seal stamp by Cao Su, reverse bears Immortals flying above clouds over fisherman, the sides incised with calligraphy.|||Height: 1 7/8 in (4.5 cm) Length: 9 3/8 in (23.5 cm) Width: 2 7/8 in (7.3 cm)|曹素功百壽墨|此墨爲長方體四面共有百個不同的壽字，兩側凹陷，一面畫有祝壽字樣，一面一幅山水畫，均有描金。作者簡介：曹素功（1615～1689），原名聖臣，號素功，安徽歙縣人。自創“紫光玉”、“天琛”、“千秋光”、天瑞”等名墨，爲權貴名流所珍愛，聲名遠揚。其業興旺，子孫相傳。爲清代四大制墨名家之一。