How to Make Bath Bombs Foam in the Water

One of the best parts of a bath bomb is its fizz, so use these tips to get the most out of your creation

While most bath bombs fizz and dissolve, some can also create a delightful foam, adding an extra layer of fun. But achieving this foamy effect involves incorporating specific ingredients and techniques. 

Here’s how you can make your bath bombs foam beautifully in the water.

Choosing the Right Ingredients

To make bath bombs that foam, you’ll need to add a foaming agent to your basic recipe. Sodium Lauryl Sulfoacetate (SLSA) is a popular choice due to its gentle nature on the skin and its ability to create a rich, creamy foam.

Adding this ingredient to your normal recipe will set the foundation for foamy bath bombs.

Proper Mixing Techniques

When mixing your ingredients, ensure that the SLSA is thoroughly blended with the dry components by sieving the SLSA into the dry mix to avoid clumps and achieve an even distribution. 

Once your dry ingredients are well combined, slowly add your wet ingredients, such as oils and water, to form a cohesive mixture. The key is to mix gently to avoid premature fizzing.

Shaping and Drying

Once your mixture is ready, it’s time to mould your bath bombs. Press the mixture firmly into your chosen moulds to ensure they hold their shape. 

Allow the bath bombs to dry thoroughly for at least 24 hours before use. Proper drying is crucial for the bath bombs to maintain their structure and to activate effectively in the water. 

Enhancing the Foam

To boost the foaming effect, consider adding a small amount of a liquid foaming agent, such as a mild liquid soap or a bubble bath solution, to your wet ingredients. This can enhance the overall foaminess without compromising the bath bomb’s integrity.

Testing and Adjusting

Before making a large batch, test a few bath bombs to see how they perform in the water. 

If you find the foam lacking, adjust the amount of SLSA or liquid foaming agent in your recipe. Remember, the water temperature and hardness can also affect the foaming action, so testing in your home environment is essential.