Consumers will definitely value the reduction of hair fibre breakage, but will desire certain sensorial benefits as well. From the consumer’s perspective, the foam properties as well as skin and hair conditioning are aspects of particular importance which are observed immediately. In particular, sensory methods are useful in determining the influence of a certain ingredient on skin feel and foam properties. When performed by trained personnel, sensory use data will closely parallel consumer preferences. The efficient skin conditioning benefits of silicone quaternium-22 are demonstrated in a sensory hand wash test conducted by a trained group of 10 panellists in a standardised washing procedure. The effect of the incorporation of just 0.5% silicone quaternium-22 was evaluated and has been represented graphically in Figure 9. The formulation of the sensory hand wash test is described in Table 6. In skin cleansing formulations silicone quaternium-22 is able to provide a remarkable improvement of wet and dry skin feel. Both during and after use, the skin feels soft and smooth with a pleasant perception of moisturisation. Furthermore the foam properties are enhanced providing the formulator a richer and denser foam with better stability. The results of the sensory hand wash test confirm the significant improvements in foam properties as well as in skin feel facilitated by the addition of silicone quaternium-22 to the formulation.


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