Using Sodium Lactate in Bar Soap

Sodium Lactate (60% Liquid) cannot be used to replace Sodium Hydroxide (caustic soda) in bar soap making. Sodium Hydroxide is a crucial ingredient for the saponification process, which is the chemical reaction that turns oils and fats into soap.

Sodium Lactate, however, is a beneficial additive in cold process soap making. It helps to:

• Make the soap bar harder
• Allow the soap to be unmolded sooner
• Potentially reduce the full curing time slightly, although a full 3-4 week cure is still recommended for the soap to be mild and safe to use.

Usage Rate:

The typical usage rate for Sodium Lactate in cold process soap is 1-3% of the total oil weight in your recipe.

Mixing Method:

Sodium Lactate should be added to the cooled lye water solution before combining the lye water with the oils. Ensure the lye solution has cooled down significantly before adding the Sodium Lactate.

Curing Time:

While Sodium Lactate helps the soap harden faster and unmold more quickly, it does not eliminate the need for a curing period. You should still allow your soap to cure for 3-4 weeks, just as you would with soap made only with Sodium Hydroxide. This curing time allows the saponification process to fully complete and excess water to evaporate, resulting in a milder, harder, and longer-lasting bar of soap.