abstract |
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a smart mask sheet that displays a line on a forehead, a ball, and a jaw when moisture is evaporated to indicate when a mask sheet is to be removed. More specifically, When a humidity indicator is formed by impregnating or applying an aqueous type microcapsule pigment to irregularly display the humidity history in the humidity indicator, when the relative humidity is changed from 90% to 100% to 50% to 60%, the color is discolored, The present invention relates to a smart mask sheet in a non-reversible manner. |