| 摘要 |
PROBLEM TO BE SOLVED: To provide a head made of synthetic fiber such as nylon whose hardness against the skin can be widely reduced and which is enabled to draw a fine line. SOLUTION: This is a fiber head made by solidifying synthetic fiber such as nylon with an adhesive. The taper part thereof is cut in a curve with single curvature over 30 mm or a straight line. The length of the taper part is made almost equal to three times as long as the diameter. The curvature is preferably over 50 mm. |
