Why take a porcelain plate, which marker draws on it, and then pour a glass of water, and it moves?

First of all, the surface of the porcelain plate is very smooth and dense, which means that the ink of the marker pen cannot penetrate into the surface of the porcelain plate, which leads to the loose combination between the ink of the marker pen and the porcelain plate and easy to fall off.

Secondly, the ink of marker pen is oily, and the characteristic of oily ink is insoluble in water, that is to say, the ink of marker pen will not be mixed with water because it is soluble in water, so the ink of marker pen can maintain a relatively complete shape without too much external force after being slowly poured into water. This also makes the pattern have general retention.

Finally, talk about the formation process of this phenomenon. When painting in a porcelain dish with an oily marker, the oily ink of the marker will not penetrate into the dish, indicating that the ink of the marker is not firmly combined with the dish. At this time, slowly pour the water, and the ink will be separated from the dish due to buoyancy, and slowly shake with the shaking of the water.

This is basically the principle.

Sometimes the plate is not so smooth that the ink is not easy to separate from the plate. Before writing, the bottom of the board will be brushed with water-soluble liquid and dried, so that the water-soluble film will dissolve after pouring water, resulting in the separation of ink from the board.