Surfactant - foam boosting

Ingredients with this function help the product to form a more abundant, dense and stable foam. For consumers, this is important primarily from the point of view of sensations: shampoo, shower gel or face wash foam are more easily distributed over skin and hair, adhere better to dirt and sebum, and are usually perceived as softer and more comfortable to use. At the same time, the foam itself does not always mean a stronger cleansing, but it significantly affects the texture of the product, the convenience of application and the consumption of funds. Such substances are especially in demand in washable cosmetics, where it is necessary to combine cleansing, pleasant sensory perception and a stable formula. (cosmeticsinfo.org)

Often such components do not work alone, but in combination with the main cleansing surfactants: they enhance foaming, make the foam more creamy and can simultaneously slightly increase the viscosity of the water base. Due to this, the product appears thicker, spreads more softly and does not "settle" so quickly in the palms or on the hair. In hair formulas, this helps to wash the length and scalp more evenly, and in skin products, it improves tactile properties without having to make the composition excessively aggressive. (cosmeticsinfo.org)

Typical examples are Cocamidopropyl Betaine and Cocamidopropylamine Oxide: both ingredients are used in shampoos and cleansers as surfactants capable of maintaining and enhancing foam; Cocamidopropyl Betaine also describes the functions of a mild cleansing and conditioning agent For some fatty acid amides, for example, Cocamide DEA, an additional increase in viscosity and stabilization of the foam is noted. Therefore, the ingredients of this group are valued not only for their visually "rich" foam, but also for their contribution to the comfort, stability and consumer properties of cosmetics. (cosmeticsinfo.org)