The oils
| Oil | As the source prints it | Share |
|---|---|---|
| Edible Tallow (beef/mutton dripping) | Tallow · 380 lb | 63.3 % |
| Rapeseed Oil (high erucic acid) | Colza-oil · 70 lb | 11.7 % |
| Coconut Oil | Cocoa-nut oil · 150 lb | 25.0 % |
How it is made
| Process | Full-boiled |
| Alkali | ley in three strengths, 18°, 24° and 30° B., 750–775 lb in total per 600 lb of fat · 762.5 lb |
| Superfat | Not stated |
| Water | as the source states it |
| Iodine value | 44 |
| INS | 165 |
This is a boiled soap. A kettle soap has its excess alkali salted out and drawn off before framing, so the recipe states the alkali charged, never the alkali the bar keeps. Read as a modern cold-process recipe it would be lye-heavy.
What the numbers say
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
The ley is staged: a third at 18°, a third at 24°, the rest at 30° B. Entered at the midpoint of the stated 750–775 lb.
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.