black film

Also contains definition of: common black film
A @[email protected] thinner than about \(\frac{1}{4}\) @[email protected] of @[email protected] light. Black films are often @[email protected], but equilibrium films may be considerably thicker under some conditions. In @[email protected] films, two types of @[email protected] are often observed: the one characterized by thickness of the order of \(7\ \text{nm}\) or more which varies significantly with minor changes in composition such as @[email protected], is called common black film.
See also:
Newton black film
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]