Making Soap
From The Crude Elements of Earth
Part 1 - Making Slaked Lime
What is Needed:
- seashells or limestone rock
- access to a kiln or bonfire
- non-aluminum container which can withstand high heat
- boil plate
- water
Key Reactions:
CaCO3 + Heat ---> CaO + CO2
Limestone + Heat ---> Lime + Carbon Dioxide
CaO + H2O <---> Ca(OH)2 + Heat
Lime + Water <---> Slaked Lime + Heat
Steps to Make Lime:
- Take seashells or limestone and heat in kiln or bonfire at 1000 C or 1800 F.
- Allow to cool to room temperature, but do not cool with water.
- Place shells or stone into container with water. Water should get hot.
- Decant solution to boil plate.
- Boil off water to yeild solid slaked lime.
Part 2 - Making Soda Ash and Potash
What is Needed:
- wood (and alot of it)
- non-aluminum container which can withstand high heat
- water
- boil plate
Steps to Make Soda Ash and Potash:
- Put water in container.
- Burn wood to make ash.
- Heat water just to boil over fire.
- Mix ash into hot water.
- Let water/ash sit for one day, undisturbed.
- Remove charcol bits which are floating on the surface.
- Decant solution to boil plate.
- Boil off water to yeild solid soda ash and potash mixture.
Part 3 - Making Lye
What is Needed:
- lime
- soda ash and potash mixture
- water
- 2 non-aluminum containers which can withstand high heat
- boil plate
Key Reaction:
Ca(OH)2 + Na2CO3 ---> 2NaOH + CaCO3
slaked lime + soda ash ---> lye + calcium carbonate
Steps to Make Lye:
- Mix 5 parts lime in water.
- Mix 7 parts soda ash/potash in water.
- Mix two solutions together thuroughly.
- Allow solid to drop out.
- Decant to boil plate.
- Boil off water to yeild lye.
Part 4 - Making Soap
What is Needed:
- lye
- fat or oil
- container which can withstand high heat
- clear container with a lid
- water
- molds for shape
Key Reaction:
(RCO)3(C3H5O3) + 3NaOH ---> 3RCOONa + C3H5(OH3)
fat + lye ---> soap + glycerol
Steps to Make Soap:
- Fill clear container with 3 parts (by wt.) water.
- Add 1 part (by wt.) lye to container. Solution will get hot.
- Melt 8 parts (by wt.) fat in other container.
- Allow fat and lye to cool down to being warm. Fat should remain a liquid.
- Pour fat or oil into clear container.
- Close lid tight and shake vigourously every 15 minutes until mixed.
- Pour into molds.
- Cover the molds.
- Allow to harden for several days.
- Remove soap from molds.
- Air cure the soap for 3 weeks.