Soap
From Federal Burro of Information
Equipment
- 2 Old pots - 2$
- Digital Thermometer - 12$
- Digital Scale - 28$
- plastic containers - free - used containers from other stuff , yogurt, wood putty
Consumed
- olive oil - 3 litre - 11$ - grocery store
- lye ( sodium hydroxide - NaOH ) - 3kg - 22$ - hardware store
Unit notes
- 1 ounce = 28.3495231 grams
- convert KOH Sap value to NaOH Spa values by dividing by 1.403 ( it's the ratio of the molecular weights , see note below )
Recipes
Used http://www.soapcalc.net/calc/SoapCalcWP.asp for calculations
Roughly
fat + base ( NaOh or KOH ) = Fatty Acids + Glycerol i.e. soap
100% olive oil take 1
| Water | 0.419 | 6.702 | 190 |
| Lye - NaOH | 0.146 | 2.342 | 66.381 |
Resources
- http://www.susanparks.com/soapworks/soapworks.htm
- http://en.wikipedia.org/wiki/Glycerol
- NaCl - Salt
- NaOH
- KOH
- The Soap Making Forums
- Grams of lye for Grams of fat X
- Thread about making NaOH http://www.sciencemadness.org/talk/viewthread.php?tid=5673
- A great Piece on "Sap Values" http://en.wikipedia.org/wiki/Saponification_values
- Handmade soap makers who aim for bar soap use NaOH (sodium hydroxide). Because saponification values are listed in KOH (potassium hydroxide) the value must be converted from potassium to sodium to make bar soap; potassium soaps make a paste, gel or liquid soap. To convert KOH values to NaOH values, divide the KOH values by the ratio of the molecular weights of KOH and NaOH (1.403).
