It means that the ink from Nishan inkstone in Qufu is fast and delicate to grind. Even if it is used for a long time, it will not feel tired.
Detailed explanation of "Good Ink, Good Ink and Long Use";
It shows that some kind of inkstone is good. Ink feeding refers to the grinding process of inkstone and inkstone, and ink feeding refers to the speed of ink from ink block to "inkstone" through grinding in water. Inking refers to the speed and fineness of the fusion of carbon molecules and water molecules in ink. Good ink, like oil, shines brightly in the inkstone, and the article rotates smoothly, so the inkstone for painting is more demanding than that for calligraphy. Ink printing pays attention to speed, ink printing pays attention to thickness, but it is often fast and thick, and good ink printing is slow. Therefore, the inkstone with good ink is extremely precious. You won't feel tired after a long time.
"Under the ink, the ink is good and it has been used for a long time." Original text:
The Nishan inkstone in Qufu is orange with uneven black pine patterns. When you look at Zhong Ling, it is smooth and moist. Making inkstone, printing ink, good ink, long-term use.