What is the principle of the magical pen-horse experiment?

The principle of the experiment is that the water-based marker pen contains a chemical called "stripper", which is insoluble in water, so the words or pictures written on the plate will leave the surface of the plate and float on the water after being soaked in water. In addition, there is an oily pen in the marker, but this pen does not contain a "stripper", so its ink cannot float on the water.

Marker, also known as marker, is a special drawing color pen used for writing or painting. It contains ink, usually with a pen cover and a hard nib. Its pigment is volatile and can be painted quickly at one time. It is often used to design articles, advertising slogans, poster drawing or other artistic creation, and has the characteristics of bright colors, convenient coloring, obvious brushstrokes and convenient carrying.

Oily ink is pungent and volatile because it contains oil essence. If the paint falls off the toy, you can use a marker to make up the color. Oily marker is quick-drying, waterproof and light-resistant. Repeated color superposition will not hurt the paper, and it is very soft.

Markers have poor coverage, and light colors cannot cover dark colors. Therefore, in the process of rendering the color on the map, it is necessary to paint the light color first and then paint the dark color. Moreover, we should pay attention to the harmony between colors, avoid using too bright colors and use neutral tones.