Measurement of foam collapse

This can be followed by measuring the bubble size distribution as function of time, by, for example, microphotography or by the counting number of bubbles. Alternatively, one can measure the specific surface area or average bubble size as a function of time. Other techniques such as light scattering or ultrasound can also be applied. 

Dickinson Introduction to Food Colloids, Oxford University Press, Oxford, 1992. 

ScHELUDKo Colloid Science, Elsevier Science, Amsterdam, 1966. 

Exerowa, P. M. Rruglyakov Foam and Foam Films, Elsevier, Amsterdam, 1997. 

Davies Proceedings of the Second International Congress of Surface Activity. 

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