| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink reverse flow preventive composition for eliminating a problem of disabling to write at a low temperature as much as possible. SOLUTION: The ink reverse flow preventive composition is provided at an upper part of an ink directly filled in an ink container. The composition comprises, at least, a volatile retardant organic liquid or a nonvolatile organic liquid selected from a hydrocarbon and the like as a base material, a gelatinizing agent, an alkylated naphthalene and/or an alkylated phenol. |
