The oils
| Oil | Share |
|---|---|
| Edible Tallow (beef/mutton dripping) | 50.0 % |
| Coconut Oil | 50.0 % |
How it is made
| Process | Cold process |
| Alkali | NaOH |
| Superfat | 0 % |
| Water | lye water at 35 % |
| Iodine value | 27 |
| INS | 199 |
What the numbers say
Hardness 66 above 29–54
Cleansing 36 above 12–22
Conditioning 26 below 44–69
Bubbly lather 36 14–46
Creamy lather 30 16–48
Computed from the fatty acids of the fats above. The bands are what the craft has settled on, not chemistry — a bar outside one is not wrong.
Try it differently
8 variationsThe same soap with one thing moved. Each opens in the calculator ready to change again.
- 1 % superfat
- 2 % superfat
- Lard (pure rendered pork fat) instead of Edible Tallow (beef/mutton dripping)
- Palm Oil instead of Edible Tallow (beef/mutton dripping)
- 1 % superfat and Lard (pure rendered pork fat) instead of Edible Tallow (beef/mutton dripping)
- 1 % superfat and Palm Oil instead of Edible Tallow (beef/mutton dripping)
- 2 % superfat and Lard (pure rendered pork fat) instead of Edible Tallow (beef/mutton dripping)
- 2 % superfat and Palm Oil instead of Edible Tallow (beef/mutton dripping)
Where these proportions come from
The one recipe where a superfat above about 1 % is a defect rather than a choice.
Craft convention: zero superfat, because free oil in laundry soap is the thing that leaves a residue on fabric.
A canonical formulation: the proportions the craft has settled on for this kind of soap. Not transcribed from a document, and not copied from anywhere.