A
film thinner than about
wavelength of visible light. Black films are often
equilibrium films, but equilibrium films may be considerably thicker under some conditions. In
soap films, two types of
equilibrium film are often observed: the one characterized by thickness of the order of
or more which varies significantly with minor changes in composition such as
ionic strength, is called
common black film.
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
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
doi:10.1351/goldbook.
