| 摘要 |
PROBLEM TO BE SOLVED: To provide: a writing instrument refill causing no ink leakage due to ink backflow and making it easy to dispose an ink backflow preventing plug; and a writing instrument with the writing instrument refill attached thereto.SOLUTION: A writing instrument refill 1 has a writing body attached to a front end of an ink accommodating cylinder 2. A writing instrument ink 5 is directly loaded into the ink accommodating cylinder, and an ink backflow preventing plug 6 is disposed separately from the ink at the rear of the ink. The ink backflow preventing plug is a fiber bundle body composed of a polyester-based fiber. The fiber bundle body is not subjected to surfactant processing. |
