| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an erasable ink composition for a writing board, which is written on a writing board having the surface composed of a non-absorbent and impermeable material and provides a holograph easily erasable immediately after writing, after being allowed to stand for many hours or being written under various environments regardless of the material of writing board, and to provide an erasable ink composition for writing board in which a ghost being a trace of a holograph remaining on a writing board after erasing the holograph is not prominent. <P>SOLUTION: The erasable ink composition for a writing board comprises inorganic particles having major axes of 10-20μm, minor axes of 0.3-1.0μm and thickness of 0.3-1.0μm. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
