Why does inkstone absorb ink very much?

Inkstone, also known as "Inkstone". The traditional stationery of the Han nationality began in the Han Dynasty. One of Four Treasures of the Study. Writing with a pen dipped in ink, pen, ink and inkstone are inseparable. Although inkstone ranks first in the ranking of "pen, ink, paper and inkstone", on the one hand, it is in the leading position, and the so-called "Four Treasures of the Study" inkstone is the first, because it is solid in texture and can be passed down from generation to generation. The naming of the four famous Chinese inkstones began in the Tang Dynasty. They are Guangdong inkstone, She Yan, Yan Tao and Hongsi inkstone. Cheng Niyan rose in the Song Dynasty. Today's four famous inkstones are Duanyan, She Yan, Yan Tao, Chengni and HongLing inkstones, which should be the five famous inkstones. In fact, there are many kinds of Gu Yan in China, far more than these. Pine stone inkstone, jade inkstone and lacquer sand inkstone all occupy a place in the history of inkstone. As three of the four famous inkstones in China, what about Duanyan and Mianhe? What's the evaluation ever? Here we do a research and discussion. The prerequisite for the following analysis is: 1, all of which are old pit stones. 2. Evaluate inkstone ink. 3. The following hardness is expressed in Mohs units. The practical function of inkstone is to grind ink, in which the amount of ink and the amount of ink are one of the important indexes to measure the quality of inkstone materials. Simply put, inking is the speed at which ink moves 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. It can be seen from the above that if the stone is soft, the apparent porosity of the inkstone is small, the minerals of the inkstone are fine, and the gap between grains is small, thus achieving better inking effect; On the other hand, the hardness of the stone shows that the softer minerals are slightly thicker and the gap between grains is slightly larger, which can achieve better inking. Ink and ink themselves are contradictory, and a good inkstone quality should just be able to reconcile the contradiction, that is, fine but not slippery, astringent but not coarse. As can be seen from the above data, among the three famous stone inkstones, Duanyan is soft and suitable for inking, while She Yan is hard and suitable for inking. Ouyang Xiu, a great writer, commented in Mo Jing: "Wan Wan originated in Longweixi, and its Shi Jian strength was mostly ink, so it was used in his last life. Venus is precious, and its stone is slightly rough, so rub it by hand. It is especially good to have a sharp-edged cable. " However, the hardness of pottery inkstone is better than that of Guangdong inkstone, and the inking property is better than that of Guangdong inkstone. Therefore, in terms of inking, adjust the contradiction appropriately.