Emilie Meyer
Making soap in a crock pot is a simple process that can be done by beginners. The process involves blending oils and a lye solution to an emulsion, which will create a raw soap mixture that is usually opaque and cream-coloured. This mixture is then poured into the crock pot and cooked until it gels along the sides, which is the hottest part of the crock pot. While there is no definitive answer for how long to cook soap in a crock pot, it is recommended to cook it for at least an hour and to keep a close eye on it to avoid a soap volcano. It is also important to use safety gear such as rubber gloves and safety goggles when handling lye, as it can be extremely dangerous.
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What You'll Learn
Crock pot size and type
When making soap in a crock pot, it is recommended to use an old crock pot designated for soap making. This is because crock pots used for soap making should not be used for cooking food. It is also important to ensure that the crock pot is large enough to prevent the soap from boiling over. Many crock pots only have heating elements on the sides and not on the bottom, in which case you may need to increase the recipe quantity to fill the slow cooker more.
The size of the crock pot will depend on the volume of ingredients used in the soap-making process. For example, a 6-quart crock pot can typically accommodate 2 to 3 pounds of oil, while a 3-quart crock pot can accommodate 2 pounds of soap-making ingredients (oils, water, and lye) with room to spare. Larger crock pots, such as an 18-quart electric roaster with a stainless steel liner, can handle even bigger batches, with some users reporting success with up to 7.8 pounds of oil.
It is important to note that the weight of the ingredients is not the only factor to consider when determining the appropriate crock pot size. The type of oil used can impact the volume of the mixture, as some oils are denser than others. Additionally, the ratio of water to lye to oils is critical in soap making, and using a soap calculator can help ensure that the correct proportions are used.
The material of the crock pot is also an important consideration. If making lye soap, it is essential to use a wooden spoon and avoid aluminium crock pots. This is because lye, aluminium, and water can react to create flammable and dangerous hydrogen gas. Instead, opt for crock pots made of ceramic or stoneware.
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Ingredients and measurements
The ingredients and their measurements for making soap in a crock pot vary depending on the recipe. However, some common ingredients and their measurements include:
Lye (Sodium Hydroxide)
This is a key ingredient in soap-making, and it can be found in hardware stores or online. When handling lye, it is important to wear long sleeves, gloves, and a mask to protect yourself from the fumes. Lye is very caustic and can cause skin damage, blindness if it comes into contact with your eyes, and even death if ingested. Always have vinegar nearby as it neutralizes lye in case of spills or splashes.
Water
Water is typically used along with lye to create a lye solution. The amount of water used will depend on the specific recipe and the desired consistency of the soap.
Oils
Various oils can be used in crockpot soap-making, including coconut oil, olive oil, and essential oils. The amount of oil used can vary, but it is typically measured in pounds or cups. For example, one recipe calls for 3 lbs. of oil, while another uses olive oil and coconut oil, specifying that the olive oil should be poured first, followed by scoops of coconut oil if it is in solid form.
Other Ingredients
Some recipes call for additional ingredients to enhance the soap's texture, appearance, or scent. These may include oatmeal, sugar, powdered milk, sodium lactate (a natural preservative), or various essential oils like lavender and orange. The amounts of these ingredients can vary depending on the desired effect and the specific recipe.
It is important to note that accurate measurements are crucial in soap-making. A digital scale is highly recommended for measuring ingredients by weight, ensuring precise quantities. Additionally, a soap calculator can be a useful tool to determine the correct ratio of water, lye, and oils for your specific recipe.
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Safety precautions
When making soap in a crock pot, there are several safety precautions you should take to ensure a safe and successful process:
Firstly, it is recommended to use a designated crock pot specifically for soap making. While some people choose to clean and reuse their crock pot for food preparation after making soap, there is a risk of residual chemicals, fragrances, or flavours affecting the taste and safety of subsequent food items. You can find second-hand crock pots at thrift stores or yard sales at affordable prices to dedicate to soap making.
Before beginning the soap-making process, it is important to wear protective gear. This includes long sleeves, gloves, and a mask. The chemicals used in soap making, such as lye, can produce fumes that may be irritating or harmful if inhaled. Keep vinegar nearby as it can neutralise lye if it comes into contact with your skin.
Always set up your crock pot in a safe area. Place the crock pot inside a larger container, such as a dish pan, to catch any spills or overflow. Keep the area well-ventilated to minimise the impact of fumes. Never leave your crock pot unattended while it is in use, as the soap mixture can expand rapidly and cause a mess or damage to your equipment.
When working with chemicals like lye, always measure by weight instead of volume. Use a digital scale to ensure accurate measurements. Additionally, use heat-resistant utensils and glass measuring cups specifically designated for soap making to avoid contamination. Avoid using wooden utensils as they can absorb chemicals and break down over time, potentially causing splinters in your soap.
Finally, be cautious when checking the temperature of your soap mixture. An infrared thermometer is a useful tool to safely check the temperature without contaminating your thermometer with caustic materials. Avoid using a traditional thermometer, as it can become coated in soap or chemicals and be difficult to clean.
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Cooking process
The cooking process for soap in a crock pot is known as the hot process method. It involves using a crock pot or slow cooker to heat and mix the soap ingredients. The first step is to prepare the crock pot by plugging it in and turning it on low. It is important to use a crock pot that is designated for soap making, as the lye used in the process can affect the pot over time. The pot should be large enough to prevent the soap from boiling over.
The next step is to prepare the ingredients, which typically include oils such as coconut oil and olive oil, water, lye, and essential oils for scent. It is crucial to wear protective gear, such as long sleeves, gloves, safety goggles, and a mask, when handling lye as it can be extremely dangerous. The lye should be mixed with water and stirred until dissolved. The oils should be measured in their liquid form and added to the crock pot. Once the lye mixture and oils are combined, an immersion blender can be used to blend the soap until it reaches a soft pudding-like consistency, also known as 'trace'.
During the cooking process, it is important to keep the crock pot covered to retain moisture and avoid dry spots. Plastic wrap can be used to cover the pot. Some people choose to stir their soap as it cooks, but this may cause evaporation issues. The soap will start to gel along the sides of the crock pot, becoming translucent, and this is a sign that it is cooking. An infrared thermometer can be used to check the temperature of the soap and ensure it is cooking properly.
The cooking time for soap in a crock pot can vary depending on the recipe and the specific crock pot used. Some sources suggest cooking the soap for around an hour, while others recommend using the zap test or checking the pH to determine if the soap is fully cooked. However, the zap test is not recommended due to safety concerns. Instead, some soap makers suggest stopping the cooking process at the gel stage, as the soap will continue to saponify in the mold.
Once the soap is cooked, it can be spooned into prepared molds and covered with parchment paper. After 24 hours, the soap can be removed from the molds but it is recommended to let it set for a few more days to prolong its lifespan. The crock pot and tools used for soap making should be cleaned carefully with dish soap, water, and vinegar to neutralize any remaining lye.
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Clean-up
Preparing the Work Area
Before beginning the soap-making process, it is advisable to have a clean and clear work area. Lay out all the required tools and ingredients, ensuring you have access to a power source for your crock pot and immersion blender. It is also recommended to use a separate crock pot for soap making, as lye can affect the crock pot over time. If using a shared crock pot, consider using a crock pot liner for easier clean-up.
Safety Gear
When handling lye, it is crucial to wear protective gear, including rubber gloves, safety goggles, long sleeves, and a mask. Lye, or sodium hydroxide, is extremely dangerous and can cause skin damage, blindness if it comes into contact with eyes, and even death if ingested. Keep a large bottle of white vinegar nearby to neutralise any spills or splashes of lye.
Cleaning the Crock Pot
The crock pot can be cleaned by simply soaking it in hot water for several hours. Since the end product is soap, it will eventually dissolve, making it easy to clean. Alternatively, you can use the soapy water to help clean your other tools. If there are concerns about lye residue, rinse the crock pot with vinegar, which effectively neutralises lye.
Cleaning Tools and Surfaces
All tools used in the soap-making process should be carefully cleaned with dishwashing soap and water, and then rinsed with vinegar to ensure no lye residue remains. This includes any measuring cups, spoons, scales, and moulds. If any lye mixture spills on surfaces or other utensils, neutralise it with vinegar.
Post-Clean-up Precautions
After clean-up, ensure that all tools and surfaces are completely dry before using them for any other purpose. Store your soap-making equipment separately from food preparation items to avoid any cross-contamination.
By following these clean-up instructions, you can ensure a safe and enjoyable soap-making experience, minimising any potential risks associated with handling lye and other ingredients.
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Frequently asked questions
The time required to cook soap in a crock pot depends on the method used. The hot process method involves cooking the soap until it reaches a soft pudding-like consistency, which usually takes around 4-5 minutes of blending. The cold process method does not involve cooking the soap at all.
The basic ingredients required to make soap in a crock pot are coconut oil, olive oil, water, lye, and essential oils. You will also need safety equipment such as rubber gloves, safety goggles, and a mask to protect yourself from the lye fumes.
It is important to use caution when handling lye as it is extremely dangerous and can cause skin damage, blindness, and even death if ingested. Always wear protective gear and neutralise any spills with vinegar. Do not leave your soap unattended while it is cooking, as it can create a ""soap volcano"" and cause a mess.
