INTRODUCTION
A foam is a substance that is formed by trapping pockets of
gas in a liquid (or solid). Depending of the final application,
they could be very unstable products with a shelf life that
doesn’t exceed few minutes. In the case of hair foams, the
breaking of the product has to be quick to enable an easy
application. Therefore the kinetics of breaking is a
fundamental parameter for the formulator. However, this
characterization is very difficult to perform due to the
rapidity of the phenomenon.
Thanks to the Turbiscan™ technology and its ability to
measure in “fixed position” mode, it is possible to study and
characterize very unstable foam. In this application note two
study were done, one to measure the effect of temperature
of hair foam and one to evaluate the repeatability of the
measurement for this application.
