| 摘要 |
PURPOSE: An environment-friendly magic pen is provided to be environment-friendly and not to be harmful for human body by using natural material, and to be easily removed by using wet cloth after drawing. CONSTITUTION: An environment-friendly magic pen uses mixed ink which comprises 70-90 weight% of natural pigment, 5-15 weight% of terebene oil, 3-9 weight% of ethylalcohol which is a solvent, and 2-6 weight% of charcoal powder. The natural pigment is obtained by leaves of a plant like drying azalea, cosmos, crape myrtle, etc, and grinding the leaves to a size of 100-500 mesh. The terebene oil is obtained by distilling of pine resin by steam, and is colorless or yellow sticky liquid. The charcoal powder has a size of 100-500 mesh. |
