how do make soap

Actually, soap is made of long chain carboxylic acid and then reacting with NaOH.
Finally salting out the formed products so that more soap is formed
See:
http://ourworld.compuserve.com/homepages/paul_norman_3/soapmake.htm#Materials
http://ourworld.compuserve.com/homepages/paul_norman_3/soapmake.htm#SoapMapChart
http://waltonfeed.com/old/soaphome.html
http://www.wholesalenaturalbodycare.com/soap_making.html
and
http://www.teachsoap.com/soapmakingmethods.html

哥士的+油+香精

份量就要你慢慢調配了。

哥士的是腐蝕性物料, 要小心使用。

油, 可用生油, 椰油

香精是用來增加香味