| 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 handwriting easily erasable immediately after writing, after being allowed to stand for many hours, or being written under various environments regardless of the material of the writing board, and to provide an erasable ink composition for a writing board with which a trace of a releasing agent remaining on the writing board after erasing the handwriting is inconspicuous. <P>SOLUTION: The erasable ink composition for a writing board contains polyoxyethylene alkyl ether and an aliphatic dibasic acid ester, an aliphatic monobasic acid ester, and anhydrous silica as a releasing agent in an ink composition containing a pigment, lower alcohol, and polyvinyl butyral as principal components. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
