Abstract:
The objectives of this study were to formulate the natural soap bar which contained wax, fat and oil from rice bran and tested their physico-chemical properties. Furthermore, the skin irritation and satisfactory tests in 30 volunteers were evaluated. The best formula of natural soap bar which was shown the best physico-chemical properties and product stability, was formula no. 1.2.1. This formula composed of rice bran oil, rice bran butter, rice bran wax, sodium hydroxide and water in the amount of 33, 20.6, 12.4, 7 and 19 grams, respectively. The overall satisfaction of natural soap bar was exhibited the score of 3.93 ± 0.58, which was slightly insignificant (p = 0.644) less than the commercial natural one (4.00 ± 0.53). In addition, the volunteers insignificantly satisfied towards the scent, intensity, color, hardness and skin moisture after using both natural soap bars (p 0.171). Additionally, the satisfaction on foaming effect of the natural soap formula no. 1.2.1 (3.60 ± 0.77) was significantly (p < 0.001) less than the commercial one (4.33 ± 0.71).