MAKING SOAP
Ingredients:
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6 lb. shortening, or lard (animal fat). A combination of both may be used.
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1 12 oz. can of Lye
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5 cups COLD Water Makes 9 lbs. soap, approx. 40 - 50 bars.
CAUTION: Only make soap in a well ventilated area, outside if possible.
Wear goggles, and rubber gloves while making soap.
Dissolve lye in the water in a stainless steel pot. Stir until dissolved
with a stainless steel, or wooden spoon.. Note: you cannot use a plastic
container, because it will melt. Any other metal besides stainless steel
will corrode from the lye.
Add shortening to the water and lye mixture, and stir. Mixture will become
very hot while mixing, and give off steam.
If you want scented soap, add 2 tsp. perfume, or scented oils, at this time,
while the soap is easy to stir.
If you don’t add any coloring, the natural color will turn out beige. Food
coloring may be added to color to your taste. You may have to continue adding
coloring as the soap mixture goes through the chemical reaction, as the color
will continue to change.
For a greater scrubbing action, you can add 1/2 cup sand, or oatmeal to your
soap mixture.
If you would like increased sudsing action, add 3 tablespoons of 20 Mule
Team Borax ®.
Stir mixture until a metal spoon can stand up straight in the bowl by itself,
will require about 10 minutes of mixing (warning: as the soap thickens, you
can wear out several pairs of arms mixing it).
Pour into mold to cure. Since the chemical reaction has finished by this
time, your mold can be of any material. A 10” × 16” × 2” cardboard
box lined with saran wrap makes a good mold.
Allow to sit for 1-2 days before cutting into bars. If you are going to wrap
it, wait an additional 1-2 days before wrapping. Soap will not get fully
hardened for about 2 weeks.
EXPLAINING THE CHEMICAL REACTION
The chemical reaction that makes soap is called saponification (sa - po -
ni - fi - ca - tion). Actually, the chemical reaction is quite different
than it appears. Instead of the lye mixing with the fat, the lye acts as
a catalyst to break down the grease.
Simple fats consist of two components. The first of these is amino acids,
the same thing that proteins are made of. This is why your body stores excess
energy as fats. The amino acids can be used to make proteins, the basic building
blocks of muscle and other tissue. Or, the amino acids can be further broken
down into simple sugars, and used as energy in our bodies. In addition to
the amino acids, fats also contain glycerols.
First of all, the Lye reacts with the grease, causing heat. This heat is
needed to help bring about the rest of the chemical reaction. Secondly, the
Lye starts breaking down the fat, into it’s two basic components, amino acids
and glycerols. The cold water that we added acts as a solvent for these
components.
Once the fat is broken down, the next phase of the reaction takes place.
Amino acids, lye, and glycerols reform to make the actual soap.
After this, the only thing left is for the soap to solidify. The water that
was added as a solvent evaporates, leaving a solid bar of soap. |