Aqueous gel ink-filled ball point pen
AssigneeMitsubishi Pencil Company, Limited
InventorTakahiro Osada
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Abstract
Provided is an aqueous gel ink-filled ball point pen having less blobbing and capable of drawing stable lines having vivid color and no uneven written intensity. The aqueous gel ink-filled ball point pen has a ball of a diameter of 0.3 to 2.0 mm at a tip point with an aqueous gel ink having a viscosity ratio (a value of (viscosity at 10 rpm)/(viscosity at 50 rpm) measured by means of an E type rotational viscometer) of 1.1 to 4.0 and controlled an ink lay down value according to JIS Standard S6053 to 50 to 200 mg/m.
Claims8
An aqueous gel ink-filled ball point pen in which the ball point pen having a ball with a diameter of 0.3 to 2.0 mm at a tip point thereof is charged with an aqueous gel ink having a viscosity ratio (a value of (viscosity at 10 rpm)/(viscosity at 50 rpm) measured by means of an E type rotational viscometer) of 1.1 to 4.0 and an ink lay down value according to JIS Standard S6053 is controlled to 50 to 200 mg/100 m.
Dependencies are inferred from the claim text.