| 摘要 |
PURPOSE:To eliminate the need for filling in a large quantity as seen in a conventional ink back-flow preventive body, and to provide an advantage, in which ink can be filled in quantity more than the conventional ink back-flow preventive body only by the reducing section of ink, by moving the composition without diminishing an initially filled quantity together with the shifting of ink in the ink housing tube of a ball point pen and keeping a volatilization preventive effect until ink is used up. CONSTITUTION:An aqueous ball point pen ink volatilization preventive composition is filled to the upper section of aqueous ink having viscosity of 10<-3>-2Pa sec (25 deg.C) in the ink housing tube of an aqueous ball point pen, and a gelatinizer and a surface-active agent having a fluorine aklyl group are blended with a difficult-volatile organic liquid or a nonvolatile organic liquid. |
