A pen that can be used for marking or marking on one or more materials such as paper, wood, metal, plastic, ceramic enamel, etc. Permanently attached, non-discoloring, standard 12-color, can be written on any paper, plastic, glass, whiteboard, metal and most other solids. The ink is oily and non-toxic, and can be wiped off with organic solvents such as alcohol. Similar to the whiteboard pen in teaching, it can be used on glass and whiteboard instead of whiteboard pen, and then wiped with alcohol.

A marker is a pen that can write marks or marks on one or more materials such as paper, wood, metal, plastic, ceramic enamel, etc. The marker is divided into oil marker and water marker. The water-based marker can write on a smooth surface or whiteboard, and can be wiped off with a cloth (whiteboard marker), while the oil-based marker is not easy to erase.