WRITING INSTRUMENT
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United States of America
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Issued Date -
Feb 6, 2025
app pub date -
Dec 14, 2022
filing date -
Dec 14, 2022
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Provided is a writing instrument in which condensation does not occur in a cap even though the writing instrument is equipped with the cap and which has high writing instrument quality and commercial value. The writing instrument includes at least a barrel in which an aqueous ink is contained; a pen tip provided on a tip side of the barrel and capable of discharging the aqueous ink; and a cap that is removably attached on a pen tip side of the barrel, wherein the aqueous ink has a vapor pressure of 10.3 to 12.3 kPa at 50° C.
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