中国清代制墨名家曹素功所制之墨。清代四大制墨家有：曹素功、 汪节庵、汪近圣、 胡开文，以曹素功(1615～1689)居首。曹氏安徽歙县严镇人，名圣臣、字昌言，号素功。他从年轻时就喜欢墨，所藏程君房墨独多，以为程氏制墨超出了古人。
 
『曹素功』，清康_六年（一六六七年）正式創造了以創始人曹素功為名的墨莊，產品列『清代四大名』墨之一，有『天下之墨推_州，_州之墨推_氏』之譽。清同治三年（一八六四年）_址_上，一直延續至今，傳綿十五代，享譽國內外。
 
主要原料：油煙，炭黑，動物膠，冰片，防腐劑（不含苯_）及天然香料等。
功能特色：墨色黝黑亮_，濃淡層次豐富，宜書宜畫，乾透後裝裱不化。
使用要點：避開熱源，置陰涼處，室溫保存；用後墨汁勿倒回瓶中；作品完成一周後裝裱更佳。
注意事項：請勿食用。切勿觸及口腔及眼睛。
 
The ink made by Cao Sugong, a famous Chinese ink-making master in the Qing Dynasty. The four major ink-makers in the Qing Dynasty: Cao Sugong, Wang Jieqi, Wang Jinsheng, and Hu Kaiwen, headed by Cao Sugong (1615~1689). He has passion for ink from a young age, and he had a lot of possession of Cheng Junfang's ink, thinking that Cheng’s ink was beyond the ancestors.
 
Raw Materials: Oil smoke, Carbon, Animal glue, Borneol, Preservatives (excluding benzene) and natural flavors.
Features: Ink color is black and bright, rich in shades, suitable for painting.
Tips: Avoid direct heat source, store the ink in a cool place, and or store at room temperature; do not return the leftover ink to the bottle after use.
Note: Do not consume the ink. Do not touch your mouth or eyes with the ink.