| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a marking pen for a writing board which solves drying of a pen point, sedimentation of pigments and inferiority of contact, and has good writing properties and erasing properties even when a pen core is left under a downward condition for a long time. <P>SOLUTION: The marking pen A for the writing board is equipped with a writing tool main body 10 with an ink storing part for storing a marking ink composition for the writing board, the pen core 20 and a cap 30, and has a structure in which a writing part of the tip of the pen core 20 is brought into contact with a fiber bundle and/or a porous member 40 mounted in the cap. The marking pen is constituted so that the viscosity of the ink is 3-8 mPa×s, and the compression set of the fiber bundle and/or the porous member 40 mounted in the cap is ≤20%, and the thickness in the axial direction of the fiber bundle and/or the porous member compressed when the cap is mounted, is ≥3 mm. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
