Licenses
Licenses and sources
Where the numbers on this site come from, and the open-source parts it uses.
Sources used on the site today
All read on November 13, 2026.
| Source | What we took | Used for |
|---|---|---|
| Saponification value, Wikipedia (last edited August 24, 2026) | Published SAP ranges for coconut oil, olive oil and shea butter, as facts | Checking that our SAP values fall inside the range |
| Saponification Chart, From Nature With Love | The KOH and NaOH values for olive oil, refined coconut oil and shea butter, as facts | Our SAP values and the cross-check of the worked example |
| Sodium hydroxide and potassium hydroxide, PubChem (NIH) | Molar masses; the GHS hazard classes of sodium hydroxide | The KOH to NaOH step; the lye safety box |
| NIOSH Pocket Guide: sodium hydroxide, CDC | First aid, protection, metals to avoid | The lye safety box |
| Lye (sodium hydroxide), Hybrid Atelier, University of Texas at Arlington | Mixing order, protective gear, ventilation, containers, eye flushing time | The lye safety box |
| America’s Poison Centers | The Poison Help number and hours | The lye safety box |
We list each source’s facts in our own words and our own table; no source’s table or text is copied.
Fonts
| What | From | License | Used for |
|---|---|---|---|
| DejaVu Sans | The DejaVu fonts project (dejavu-fonts.github.io) | Bitstream Vera Fonts License; DejaVu changes in the public domain | Lettering drawn into the share image and app icons (not served as a font) |
The DejaVu license allows the fonts to be used, copied and distributed freely, with its copyright and permission notice kept; the full text is in the DejaVu license.
Our own work
The pages, the worked example, the code and the BatchFinch mark are our own work. The pages use your device’s own system fonts and no third-party code. Scripts from outside this site: our self-hosted Umami counter, and Google Analytics only if you accept it (see privacy).