| 摘要 |
Provided is an ink reservoir for a writing instrument molded from a gas barriering resin such as polyvinyl alcohol, an ethylene*vinyl alcohol copolymer resin, polyacrylonitrile, polyamide, a cellulose resin, polyester, polycarbonate and polystyrene, wherein a vapor-scarcely permeable coating layer having a vapor permeability (P1) of 0.5 g/m<2>*atm*24hr/25 mu m or less at 40 DEG C and 90 % RH is formed on the above reservoir for a writing instrument. <??>In this ink reservoir for a writing instrument, a gas barriering property is not reduced under the environment of high moisture even if a wall of the ink reservoir is relatively thin and a resin having an excellent transparency is used, and releasing of pressurized air in the ink reservoir and falling of the tip member are not caused. <IMAGE>
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