| 摘要 |
PURPOSE:To provide a writing material, by which writing images such as written graphics, characters and the like can be made visible and invisible any number of times. CONSTITUTION:A fluorescent pen 1 is equipped with a writing part 2 with a pen point 8, in which transparent fluorescent ink having the property for emitting visible light by being irradiated with ultraviolet rays or the like is infiltrated, a built-in UV lamp for emitting ultraviolet rays, a light emitting part 3, which radiates ultraviolet rays outside through a lens 32b, and a driving part, which is built in the light emitting part 3 so as to drive the UV lamp in order to emit ultraviolet rays. Thus, writing images such as written characters, graphics and the like can be made visible and invisible any number of times. |
