| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a writing instrument capable of improving temporal stability by enabling discharge of ink made of a highly-pseudoplastic fluid to enable use of a pigment made of large particles.SOLUTION: A writing instrument has a writing pen point 12 attached to a tip of a barrel 10 housing shear-rate thinning ink. In the writing instrument, a flexible cylindrical body 14 for guiding the ink to the writing pen point 12, and a torsional member 16 capable of rotating the writing pen point 12 in a circumferential direction by a writing load on the writing pen point 12 are provided at the tip of the barrel 10.</p> |
