The association between clays and gums is indicated to obtain stable clay dispersions at different temperatures since most gums, in contrast to clays, have a chemical structure without the tendency of association (11). Thus, studies have been developed with dif- ferent concentrations and kinds of gums, as well as with other humectant concentrations, in order to stabilize these formulations in light-and-temperature storage conditions. In most clay mask formulations, clays are used in aqueous suspensions, and they present gelification under certain conditions of pH values, electrolytes, clay concentration, and temperature (14,18-20). The results obtained in this study indicate the behavior of these formulations at different temperatures in storage conditions. These results are of a great importance and can determine in which conditions the clay can be used, since formu- lators are more concerned with the behavior of clay in the presence of the other ingre- dients, rather than in water alone. Understanding the mechanism of gel structure formation has important implications for its optimization in order to control the settling of clay suspensions, although this is beyond the scope of this paper and needs further study.