Hydrophilic-lipophilic balance
MEASURE OF THE DEGREE TO WHICH A SURFACTANT IS HYDROPHILIC OR LIPOPHILIC
The hydrophilic–lipophilic balance of a surfactant is a measure of the degree to which it is hydrophilic or lipophilic, determined by calculating values for the different regions of the molecule, as described by Griffin in 1949 and 1954. Other methods have been suggested, notably in 1957 by Davies.