On the other hand, Test Examples 3-2 to 3-5, wherein 1 to 4% oftrimethylglycine was blended, the solidification point and the hardness could be increased without the deterioration of the solubility by rubbing and the foaming property. However, when the blending quantity oftrimethylglycine was 6%, crystallization took place as expected. Although the basic function of the soap was not affected, the transparency as transparent soap had a declining trend.