Overrun was measured according to the method of Phillips,
Haque, and Kinsella (1987). The foam was gently scooped into
a standard weigh boat (100 mL), leveled using a rubber spatula, and
weighed. This process was repeated 3 times per foam and was
completed within 5 min after whipping. The mean of 3 weights was
used for overrun and air phase fraction calculations according to
Equations