这是计算碱和水的方程式；
The saponification values of any oil, fat or butter through various websites with SAP charts. If you need to figure lye/water solution for oils/fats/butters to create soap, the formula is a simple algebra eqaution as follows:
(x) . (y) = z
(x) / (y) = z
(x) - (y) = z
More specifically :
( Oil Weight ) x ( SAP Value of Oil) = Amount of Lye
Then..
( Amount of Lye) / ( 0.3) = Total Weight of Lye/water solution
Then..
(Total of Lye/Water Solution) - ( Amount of Lye) = Amount of water
The chart below lists SAP values for commonly used oils in soapmaking.
Sap Value
Almond Oil 0.136
Apricot Kernal Oil 0.135
Avocado Oil 0.133
Babassu Oil (Brazil Nut Oil) 0.175
Beeswax (White) 0.069
Borage Oil 0.136
Canola Oil (Rapeseed) 0.124
Castor Oil 0.128
Cocoa Butter 0.137
Coconut Oil 0.19
Cod Liver Oil 0.132
Corn Oil 0.136
Cottonseed Oil 0.138
Crisco/Veg Shortening 0.136
Flaxseed Oil 0.135
Grapeseed Oil 0.126
Hazelnut Oil 0.136
Hemp Seed Oil 0.137
Java Cotton Oil 0.137
Jojoba Oil 0.069
Karite Butter (Shea Butter) 0.128
Kukui Nut Oil 0.135
Lanolin 0.074
Lard 0.138
Macadamia Nut Oil 0.139
Mango Butter 0.135
Mink Oil 0.14
Mustard Seed Oil 0.124
Neem Oil 0.136
Olive Oil 0.134
Palm Butter 0.156
Palm Kernel Oil 0.156
Palm Oil 0.141
Peanut Oil 0.137
Poppyseed Oil 0.138
Pumpkinseed Oil 0.135
Rice Bran Oil 0.129
Safflower Oil 0.136
Sesame Seed Oil 0.133
Shea Butter 0.128
Shortening (Vegetable) 0.136
Soybean Oil 0.134
Sunflower Seed Oil 0.134
Tallow (Beef) 0.14
Walnut Oil 0.136
Wheatgearm Oil 0.132
