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.