Why let lye and oil cool?

by Brett
(WA)

I have been following the advice in your Cold Process Soap Tutorial with good success after experiencing the odd failure beforehand.

But there is one thing I do not understand. Since the reaction between the lye and oil is driven by heat, why the need to let either cool down to specified temperatures. Would not the reaction proceed more effectively at higher temperatures?

Thanks for the excellent instructions.
Brett.

Answer:

I don't know if the reaction will proceed more effectively at higher temperatures but it will definately proceed more rapidly...and that's not always a good thing.

There are a number of reasons to allow the lye and oils to cool somewhat before blending together.

1. Extreme heat will be more destructive to any nutrients in the soap.

2. Scent that you add may evaportate and will definately be weaker in the final product.

3. Seizing is more likely to occur at extreme temperatures.

4. The soap batter will often have a grainy or curdled texture rather than a smooth one.

5. Soap making with cooler temperatures gives you more time to be creative with your soaps.

Happy soaping,
Cathy