The oils
| Oil | As the source prints it | Share |
|---|---|---|
| Lard (pure rendered pork fat) | Lard · 112 lb | 100.0 % |
How it is made
| Process | Cold process |
| Alkali | caustic soda ley at 36° B., added in two halves of 28 lb · 56 lb · 36° Bé |
| Superfat | Not stated |
| Water | as the source states it |
| Iodine value | 60 |
| INS | 138 |
What the numbers say
Hardness 42 29–54
Cleansing 2 below 12–22
Conditioning 55 44–69
Bubbly lather 2 below 14–46
Creamy lather 40 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.
The source
Single-fat, cold-made, and the temperature is capped at 149 °F. Watt judges the finish by hand: the soap "should feel somewhat unctuous when pressed between the fingers, but exhibit no greasiness".
Alexander Watt, The Art of Soap-Making: A Practical Handbook of the Manufacture of Hard and Soft Soaps, Toilet Soaps, Etc., Crosby Lockwood and Co., London, 1884, p.83. The Art of Soap-Making: A Practical Handbook of the Manufacture of Hard and Soft Soaps, Toilet Soaps, Etc. · read 2026-09-22
Read from the Internet Archive OCR of the Cornell University Library copy. Page numbers are taken from OCR'd running headers and may be one out where the header digits were damaged.
Read from a scan rather than a proofread transcription, so the figures are checked against the book’s own printed total where it prints one.