Duck Fat, flesh and skin
Saponification values, fatty acid makeup, and what this oil does in a bar of soap.
Saponification values
Grams of lye needed to saponify one gram of duck fat, flesh and skin. Multiply by your oil weight, then apply your superfat.
- NaOH (bar soap)
- 0.138
- KOH (liquid soap)
- 0.194
- Iodine
- 72
- INS
- 122
Fatty acid profile
These figures account for 94% of duck fat, flesh and skin. The remainder is made up of fatty acids this model does not track, so treat the derived qualities below as indicative rather than complete.
| Fatty acid | Percentage |
|---|---|
| Oleic | 44% |
| Palmitic | 26% |
| Linoleic | 13% |
| Stearic | 9% |
| Myristic | 1% |
| Linolenic | 1% |
Soap qualities at 100%
What a bar made entirely of duck fat, flesh and skin would score. Almost nobody soaps a single oil at 100% — this is here so you can see what the oil contributes to a blend. The shaded band is the range most makers aim for in a finished recipe.
Oils that behave similarly
Closest matches by fatty acid makeup — the usual starting point when you have run out of duck fat, flesh and skin and need a substitute. Check the lye maths again after swapping: SAP values differ even between oils that behave alike.
- Andiroba Oil,karaba,crabwoodSAP 0.134 NaOH
- Emu OilSAP 0.135 NaOH
- Lard, Pig TallowSAP 0.141 NaOH
- Neem Seed OilSAP 0.138 NaOH
- Ostrich OilSAP 0.139 NaOH