| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems of the disconfirmation result of color of ink due to discoloration of a retaining tube by the rubbing with a ruler in the case of repeated writing with the retaining tube by thrusting against the ruler or the like and also the problem of the peeling off of the color through the rubbing (through the friction) due to the repeated sliding between the retaining part and the opening part of the barrel of a retractable type writing utensil. <P>SOLUTION: On the surface of a refill housed with ink as shown in fig, 9, an uneven part 25 is formed so as to let the color of ink display with the uneven part 25 under the condition that the means roughness of the uneven part is set to be ≥1.6 μm Ra and ≤50 μm Ra. <P>COPYRIGHT: (C)2009,JPO&INPIT |
