PREPARATION AND CHARACTERIZATION OF FACIAL POWDER CLEANSERS PREPARED FROM COLORED CLAYS

The objectives of the present study were to formulate facial powder cleansers using colored clays, green clay or red clay, as main ingredients and to investigate the foaming and cleansing properties of the powder cleansers. For foaming and cleansing purposes, natural foaming tea and synthetic sodium cocoyl isethionate (SCI), were employed. Eight formulations were prepared by varying types and amounts of colored clays (58.5% and 68.5% w/w) as well as surfactants (10% and 20% w/w). The formulations F1 to F4 contained red clay whereas F5 to F8 contained green clay. Then, appearances, pH values, foaming and cleansing abilities of the formulations were investigated. The stability of the cleansers was also evaluated by keeping the preparations at ambient temperature and 45 °C for 60 days. Small differences in color shades of facial cleansers were detected using a spectrophotometer and CIELAB color system. The prepared cleansers had weak acidic pH (pH 5.7 to pH 6.5). The formulations with synthetic SCI had superior foaming property to those with foaming tea (p < 0.05). Every formulation had the ability to remove makeup (lipstick and liquid foundation) applied on glass petri dishes. Again, the cleansing ability depended on the type of surfactants used and the synthetic SCI displayed more effectively than the natural one (p < 0.05). Under stability study, the foaming and cleansing abilities of the formulations reduced significantly (p < 0.05). In the current work, color shades and amounts of surfactants did not noticeably affect the foaming and cleansing properties of the powder cleansers.