| 摘要 |
PURPOSE:To provide a color pen having a storage part for holding a coloring composition containing a quenchable pigment and a pen point connected to the storage part, giving a written mark quenchable or discolorable by light irradiation and useful for the preparation of important documents, etc. CONSTITUTION:The objective color pen 1 is provided with a storage part 2 for holding a coloring composition containing a quenchable pigment such as cyanine pigment and a salt of an organic boron compound (e.g. butyl triphenyl borate) and capable of being quenched or discolored by light irradiation and a pen point 3 connected to the storage part. |
