| 摘要 |
PROBLEM TO BE SOLVED: To squeeze out smoothly ink from a mouthpiece by grasping a writing utensil in normal holding posture. SOLUTION: A cylinder body 2 of a writing utensil for marking a fiber roll end is composed of a double layer structure of a metallic exterior cylinder body 3 and an interior cylinder body 4 of soft resin material to set to a solidity wherein a shape will not restore to its original state when a crushed one is left as it is, and a compression strength for compressing the cylinder by 5mm when a viscosity of ink is about 1,500 to 30,000cPs (20 deg.C) is set to 0.5 to 1.5kgf, preferably to 0.6 to 1.1kgf. |
