| 摘要 |
PURPOSE:To enable expression of letters and picture on a base sheet without the need for a pen pressure, by a method wherein a coloring agent solution is applied on a developer, previously adhered to a base material, for coloring. CONSTITUTION:A coloring agent solution 11, which is produced by dissolving a publicly-known coloring agent with solvent, is contained in a container 12. The coloring agent solution 11 is applied to developer 16 previously adhered to a base sheet 15 through a pen point 14 provided at the end of said container 12 for producing a chemical reaction between the coloring agent 11 and the developer 16, whereby latters and a picture can be expressed just as the pen point rubs the base sheet 15. |
