Preferred Label : black film;
IUPAC definition : A film thinner than about 1/4 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 films are often observed: the one characterized
by thickness of the order of 7 nm or more which varies significantly with minor changes
in composition such as ionic strength, is called common black film.;
Origin ID : B00678;
See also
A film thinner than about 1/4 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 films are often observed: the one characterized
by thickness of the order of 7 nm or more which varies significantly with minor changes
in composition such as ionic strength, is called common black film.
