Hello Rhamnose only soluble in water. will not be able to dissolve in oil If a member makes oil soap Probably won't be able to use it. If it's an oil formula Dear, recommend to consider ส่วนผสมดับกลิ่นกาย other such as Citromask
fit in "Technique" I can see that it can be used with bar soap. So I assumed that if Rhamnose soluble only in water. It will be mixed with water before slowly bringing the water to dissolve the alkali.