| 摘要 |
The invention provides an aqueous ink composition which can be erased relatively easily even after writing with a great tool force. The invention relates to (1) an erasable aqueous ink composition containing at least one colorant, characterized in that the colorant has a mean particle size of not less than 2 mum and that particles having a size of not more than 1.8 mum account for not more than 1.6% by weight of said colorant; (2) an erasable aqueous ink composition containing at least one colorant, characterized in that the colorant has a mean particle size of not more than 7 mum and that particles having a size of not less than 7 mum account for not more than 0.5% by weight of said colorant and (3) an erasable aqueous ink composition containing at least one colorant, characterized in that the colorant has a mean particle size of 2 to 7 mum, that particles having a size of not more than 1.8 mum account for not more than 1.6% by weight of said colorant and that particles having a size of not less than 7 mum account for not more than 0.5% by weight of said colorant.
|
