Hot process soap making involves cooking the soap mixture, which speeds up the saponification process—the chemical reaction that transforms oils and lye into soap. Unlike the cold process method, which requires a lengthy curing time, hot process soap can be used shortly after it has cooled and hardened. This method is particularly appealing for beginners who want to see quick results.

To make olive oil soap using the hot process method, you will need the following ingredients:

Olive Oil: 325 grams (75% of the total oils)
Coconut Oil: 125 grams (25% of the total oils)
Distilled Water: 165.78 grams
Sodium Hydroxide (Lye): 66.31 grams

Equipment Needed

Crockpot
Digital scale
Lye-safe container (preferably plastic)
Immersion blender
Soap mold (can be a silicone mold, loaf pan, or any container lined with parchment paper)
Safety gear (gloves, goggles, long-sleeved shirt)
Vinegar (for neutralizing spills)

1. Prepare Your Workspace

Ensure that your workspace is well-ventilated and free of clutter. Put on your safety gear, including gloves and goggles, to protect yourself from the lye.

2. Measure Your Ingredients

Using a digital scale, accurately measure out all your ingredients. Precision is crucial in soap making to ensure the proper chemical reaction occurs.

3. Mix the Lye Solution

In a well-ventilated area, slowly add the lye to the distilled water while stirring. Important: Always add lye to water, not the other way around, to prevent a dangerous reaction. The mixture will heat up and produce fumes, so avoid inhaling them directly.

4. Heat the Oils

In your crockpot, add the olive oil and coconut oil. Turn the crockpot on low and allow the oils to warm until they are fully melted.

5. Combine Lye and Oils

Once the lye solution has cooled (to about 100°F), slowly pour it into the warmed oils while stirring continuously.

6. Blend to Trace

Using an immersion blender, mix the soap until it reaches "trace." This is when the mixture thickens and leaves a trail when drizzled over itself, resembling pudding. This process usually takes about 5-10 minutes.

7. Cook the Soap

Cover the crockpot and let the soap cook on low for 30-45 minutes. Stir occasionally to prevent it from bubbling over. The soap will rise and fall during cooking.

8. Check for Doneness

To check if the soap is ready, perform the “zap test” by placing a small amount on your tongue. If it doesn’t zap you, the soap is ready to pour into molds. If it does zap, continue cooking for a bit longer.

9. Pour into Molds

Once the soap is done, pour it into your prepared molds. Smooth out the top with a spatula if desired.

10. Unmold and Cure

Allow the soap to set for 12-24 hours. Once hardened, remove it from the mold and cut it into bars. Although hot process soap can be used right away, allowing it to cure for 1-2 weeks will improve its texture and lather.

Olive oil soap is renowned for its moisturizing properties and is suitable for all skin types, including sensitive skin. The high oleic acid content in olive oil helps to nourish and hydrate the skin without stripping its natural oils.

Making olive oil soap using the hot process method is a rewarding and enjoyable project that results in a high-quality product. With just a few simple ingredients and some basic equipment, you can create your own natural soap that is gentle on the skin. Remember to take all safety precautions seriously, especially when handling lye. Enjoy your soap-making journey and the benefits of using your very own handmade olive oil soap!

For more detailed guidance, check out Coconut + Olive Oil Hot Process Soap and other resources on hot process soap making. Happy crafting!