in which mass transfer can occur between the film
and the coexisting bulk phases, for all the components. The term partly open film applies to a film
in which mass transfer can occur only for certain components. The term closed film applies to those films with fixed mass.
PAC, 1994, 66, 1667
(Thin films including layers: terminology in relation to their preparation and characterization (IUPAC Recommendations 1994))
on page 1671
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