| 摘要 |
PROBLEM TO BE SOLVED: To provide a cigarette filter excellent in interesting property such as color change caused by smoking, a cigarette having the filter, and a method for changing a filter color.SOLUTION: A filter base material is colored into a pale color with a coloring agent having a hue (H) in the range of +15 to +47.5 or -10 to -35, when expressing 5Y as 0, a clockwise direction as +(plus) and a counterclockwise direction as -(minus), in a Munsell hue ring 100.SELECTED DRAWING: None |
