Corneometry is a widely practiced method for the measurement of skin
hydration Hydration may refer to:
* Hydrate, a substance that contains water
* Hydration enthalpy, energy released through hydrating a substance
* Hydration reaction, a chemical addition reaction where a hydroxyl group and proton are added to a compound
* ...
. It uses a
capacitive
A capacitor is a device that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other. It is a passive electronic component with two terminals.
The effect of a c ...
sensor to measure the
relative permittivity
The relative permittivity (in older texts, dielectric constant) is the permittivity of a material expressed as a ratio with the electric permittivity of a vacuum. A dielectric is an insulating material, and the dielectric constant of an insulat ...
of
upper skin layers. Because these depend on hydration of skin, the measured value is a measure for skin hydration.
The name ''corneometry'' is derived from the German trademark ''Corneometer''.
[''Corneometer'': Entry in the German trademark registe]
no. 1007781
/ref> In 1979 the first commercial instrument for measuring skin hydration was sold under this name.
Literature
Skin physiology
Skin tests
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