Antonio Mcgowan
Creating your own cold-process soap can be a fun and rewarding experience, but it can also be challenging to get the fragrance just right. Certain fragrance oils can behave unpredictably, causing issues like ricing, separation, or acceleration. To make fragrances stick, it's important to understand how they interact with other ingredients and to choose the right additives. Testing fragrances and understanding their behaviour is key, and there are many techniques to try, from using kaolin clay as an additive to pairing lighter scents with deeper, more complex scents to act as an anchor.
Characteristics and Values Table for Making Fragrances Stick in Cold Process Soap
| Characteristics | Values |
|---|---|
| Temperature | Lower temperatures to around 105-115°F. Higher temperatures can cause acceleration or overheating. |
| Water | Use the full amount of water recommended by the Lye Calculator to prevent acceleration. |
| Mixing | Mix fragrance oil with an equal amount of liquid oil and heat for about 20 seconds before adding to the trace. |
| Timing | Add fragrance at the last second before getting the soap into the mold. |
| Colourants and Additives | Add colourants and additives first, before the fragrance. |
| Tools | Use a whisk instead of a stick blender to avoid thickening the mixture too quickly. |
| Testing | Test fragrances and take notes on their behaviour during mixing and curing. |
| Curing | Cure soap in a cool, dry place out of direct sunlight to maintain scent strength. |
| Fragrance Type | Use essential oils, as these tend to behave well in cold process soap. |
| Fragrance Choice | Choose fragrances that don't cause unexpected issues like ricing, separation, or acceleration. |
| Anchoring | Use additives like kaolin clay to anchor and retain fragrances. |
| Measurement | Use pipettes for accurate fragrance measurement and to avoid contamination. |
| Usage Rates | Adjust fragrance usage rates to ensure scent retention. |
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What You'll Learn
- Using kaolin clay as an additive to anchor fragrances
- Using colloidal oatmeal to make soap more fragrant for longer
- Using a low flashpoint scent and lower temperatures to avoid gel phase
- Using a whisk and stick blender to mix in colourants, additives and fragrances
- Using a drop swirl technique to add fragrance to the larger soap batter
Using kaolin clay as an additive to anchor fragrances
Using kaolin clay as an additive is a popular way to anchor fragrances in cold process soap. It is a simple, inexpensive, and skin-friendly ingredient that can enhance the fragrance of your soap.
Kaolin clay is a versatile additive that won't alter the colour of your batch oils, except perhaps to lighten them slightly. Its super-fine texture means it won't affect the texture of your soap, leaving it smooth and adding a bit of "slip" to your soap bars. It is also a natural humectant, helping the skin lock in moisture, and is generally well-received by all skin types.
To use kaolin clay as a fragrance anchor, you can add it directly to your fragrance oils. The suggested usage rate is between 1/2 TBS to 2 TBS per pound of batch oils. For example, if you're using ""Botanical Bliss" fragrance oil, you can enhance its delicate spa-like scent with kaolin clay.
While kaolin clay is a popular choice, it's not the only additive for anchoring fragrances. Other fine clays, colloidal oatmeal, and soft botanicals like calendula petals can also be used. These additives provide a base for fragrance oils to cling to, increasing their potency and longevity. However, kaolin clay stands out as a versatile and effective option that won't break the bank.
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Using colloidal oatmeal to make soap more fragrant for longer
When making cold-process soap, certain fragrance oils can behave unpredictably. To make your fragrances stick, you can use additives that easily absorb oil, such as colloidal oatmeal, to keep scents anchored.
Colloidal oatmeal is an extremely fine powder that is soothing and gentle on irritated, sensitive, or dry skin. It can be used to create a smooth, non-scratchy, and comfortable bar of soap. It is also known to be a good exfoliant.
To use colloidal oatmeal in soap-making, you can add up to 5% of the total weight of your mixture. It is recommended to add 1-2 tablespoons of colloidal oatmeal per 5 lbs of oil. You can add the colloidal oatmeal at a light trace with a whisk and then continue stick-blending.
In addition to using colloidal oatmeal, there are other ways to make fragrances last longer in cold-process soap-making. One popular method is to use kaolin clay, which is an inexpensive additive that is well-received by all skin types. It will not alter the colour of your batch oils and will not impart a gritty texture to your recipes. Another way to make fragrances last longer is to use recipes with a large percentage of soft oils, or oils that are liquid at room temperature. This will give you more time to work. You can also try lowering your temperatures to around 105-115°F, as higher temperatures can cause acceleration or overheating.
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Using a low flashpoint scent and lower temperatures to avoid gel phase
When making cold-process soap, the gel phase is when the soap goes through several pH changes. This harsh environment can cause the scent to fade or change. To avoid this, some soap makers use a low flashpoint scent and lower temperatures to prevent the soap from reaching the gel phase.
The gel phase can be triggered by higher temperatures, so keeping the soap at a lower temperature can help to avoid this. Soap makers suggest keeping the temperature between 105-115°F. This can be achieved by using individual silicone moulds or other small, non-insulating moulds to prevent the soap from retaining heat. Lowering the temperature can also prevent the soap from overheating, which can cause cracking or an uneven texture on top, known as "alien brain".
If you are using a low flashpoint scent, it is recommended to avoid the gel phase to be extra careful. The theory is that heating the oil to its flashpoint can cause it to burn off and fade. While some soap makers have not noticed substantial fading at higher temperatures, it is still something to consider.
To further prevent overheating, you can also tweak your recipe by using a lower superfat level and water discounting. Additionally, pouring the soap into the mould at a thicker trace can help prevent soda ash, which is a common issue in soap-making.
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Using a whisk and stick blender to mix in colourants, additives and fragrances
When making cold process soap, you can use a whisk and a stick blender to mix in colourants, additives, and fragrances. First, weigh your fragrance oil in a glass container and set it aside. You can also prepare your colourants by dissolving them in oil. Once the lye has cooled, pour it into the mixing bowl with the oils and blend the soap until it reaches a light trace. At this point, you can add your fragrance oil. Use a whisk to mix in the fragrance oil, stirring it in completely. You can also add in any colourants and other additives at this stage. Mix everything together until it is well combined.
It is important to note that the stick blender should not be used for food preparation as it will come into contact with lye and fragrance oil. A stainless steel stick blender is best. If you are using a whisk, make sure it is a stainless steel wire whisk. You can use a handheld whisk to dissolve colourants like titanium dioxide, which tends to need a lot of mixing to be properly dissolved. Once the colourants are dissolved, you can use a stick blender to mix them into your soap mixture.
Some fragrance oils can behave unpredictably in cold process soap, so it is recommended to do your research beforehand. Kaolin clay is a popular additive used to anchor fragrances in cold process soap. It won't darken or alter the colour of your batch oils, and it is well-received by all skin types. You can also use other fine clays or additives that can easily absorb oil to help keep scents anchored.
Remember, when adding fragrances, colourants, and additives, it is important to work quickly as the soap will start to thicken. You can separate the soap into different parts and add different colourants to create unique designs. Pour the soap into your mould, alternating layers of different colours, and use a chopstick or wooden skewer to create swirls.
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Using a drop swirl technique to add fragrance to the larger soap batter
The drop swirl technique is a fun and easy way to add fragrance to your cold process soap. This technique involves pouring different colours of soap from different heights into the soap mould to create downward swirls. The swirls produced can be wispy and intricate or bold and chunky, depending on the thickness of the batter. Thinner batters produce more intricate swirls, while thicker batters result in chunkier swirls.
To get started, prepare your ingredients and work area. Timing is crucial when creating swirled soap, as the soap batter will thicken over time. Have your colourants mixed, fragrances weighed, and all the necessary tools nearby. It is also important to choose a fragrance oil that behaves well in cold process soap and does not cause the soap to thicken too quickly.
Once you are ready, pour your soap batter into the mould. You can use a skewer or other tools to create additional swirls or texture on the top of the soap. For the drop swirl technique, pour different colours of soap from varying heights into the mould to form downward swirls. The height at which you pour the soap will affect the appearance of the swirls, with higher distances creating more dramatic swirls.
To add fragrance to the soap batter, choose a fragrance oil that complements your desired scent profile. Mix the fragrance oil with an equal amount of liquid oil from your batch and heat it in the microwave for about 20 seconds. This will prevent the fragrance from cooling down the soap batter and give you more time to work. Add the heated oil to the soap batter just before you are ready to pour it into the mould.
By following these steps and experimenting with different heights and colours, you can create beautifully swirled cold process soap with your desired fragrance using the drop swirl technique.
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Frequently asked questions
To make fragrances stick in cold-process soap, you can use an additive with the ability to absorb oil, such as kaolin clay. This will help to anchor the scent and prevent it from fading.
To prevent issues such as acceleration, ricing, or separation, it is important to research ingredients beforehand and understand how the fragrance will behave in your soap. You can also test the fragrance in a small batch first.
The best way to add fragrance to cold-process soap is to add the scent to the batter at a light trace. This method takes more time but allows for more complex designs.
The amount of fragrance to add depends on the oil you choose. For a strong scent, you can add up to 0.7 ounces of fragrance or essential oil per pound of cold-process soap. However, this number may vary, so it is important to test and adjust accordingly.
