What is easy to make ink?

"Easy water to make ink" means "easy ink to make ink".

Yishui ink is the name of ink produced in Yizhou, also known as Yi Xuanguang. Yi: refers to Yishui; Black and bright ink is better, so it is called "dark light". After the Tang Dynasty, Yizhou produced famous ink products by Zu, Li, Zhang and Chen, which was called "Yishui Law". Yizhou is famous for producing good ink, which was also a tribute at that time.

Yizhou in ancient times is now Yixian County, Hebei Province.

The most famous ink in the world is Hui ink. Huimo originated in Zhangzhou, Southern Tang Dynasty. In the process of production and processing, Mo Hao added precious raw materials such as musk.