The determination is carried out in the following way: Measurement of the maximum force which can be exerted before the film breaks, the force being exerted vertically on a stirrup or ring, in contact with he interfacial liquid film between two immiscible liquid phases placed in a measuring cup, in order to draw up the interfacial film. The force must pass through a maximum, otherwise the measurement is not valid.
Status: PublishedPublication date: 1986-03
Edition: 2Number of pages: 10
Technical Committee: ISO/TC 91 Surface active agents
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