equilibrium film

A liquid @F02366@ of thickness, or thicknesses, at which it is @S05900@ or @S05901@ with respect to small thickness changes. Unless the area of the @F02366@ is small, its composition may not be the same over its area and the (@M03872@) equilibrium thickness may be characteristic of the local condition only.
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]