Surface tensionThe surface tension reduction in the prepared shampoo was found to be of about 35.18 dynes/cm (Table 3). One of the mechanisms in the detergency property is the lowering of surface tension, and this will be the marker for a good detergency effect of the shampoo which could be done by reducing the surface tension of water from 72.8 dynes/cm to the surface tension of water 32–37 dynes/cm.