| abstract |
A functional material which fades in color with thenvolatilization of volatile agents such as fragrant agents,ndeodorant agents, antibacterial agents, etc. so that anuser can visually check the end of the effect of suchnagents. A volatile agent and an oil-soluble dye having andissolving proportion of 0.0001-1% are carried on anporous carrier undyeable with, i.e. low in affinity fornthe oil-soluble dye. The content of the oil-soluble dyenis 0.1 - 100 µg per square centimeter of the effectivensurface area of the porous carrier. |