| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To evaluate a moisture retention state of a horny layer with the amount of water interacting with components for composing the horny layer as a criterion, and to perform screening evaluation of humectant useful for retaining moisture of the horny layer for applying to cosmetics. <P>SOLUTION: In the evaluation method of a moisture retention state of the horny layer with the amount of substitution of heavy hydrogen to constituents for composing the horny layer when the horny layer is subjected to heavy hydrogen treatment as an index of the amount of water capable of interacting with the constituents for composing the horny layer, the amount of change or a change rate of IR spectrum intensity originating from a specific functional group of the constituents for composing the horny layer before and after the heavy hydrogen treatment is used as a standard of the amount of substitution of heavy hydrogen. Also disclosed is a method of screening humectant utilizing the evaluation method. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
