film tension

https://doi.org/10.1351/goldbook.F02381
The contractile force per unit length, \(\unicode[Times]{x3A3}_{\text{f}}\), exerted by an @[email protected] in contact with the bulk phase.
Source:
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 614 [Terms] [Paper]