WATER-BASED INK COMPOSITION FOR DIRECT LIQUID-TYPE WRITING UTENSIL AND DIRECT LIQUID-TYPE WRITING UTENSIL CONTAINING THE SAME

摘要

PPROBLEM TO BE SOLVED: To provide a water-based ink applicable to writing utensils equipped with a synthetic resin pen point, improved in pen point wettability, causing neither ink drops via a nib due to the pressure change inside the writing utensils nor handwriting bleedings, and also deteriorating no dry-up proofness at the nib. PSOLUTION: The water-based ink is such as to be contained in direct liquid-type writing utensils functioning to guide ink via a pen point to a nib. This water-based ink comprises a colorant, a polyoxyethylene sterol of the general formula(1)( wherein, R is methyl or ethyl; and n is a natural number of 3-30 ) as surfactant, and water. PCOPYRIGHT: (C)2007,JPO&INPIT