If you're making bath bombs and you want to ensure they float, here are some tips and tricks that might help:
Use lightweight ingredients: One of the biggest reasons why bath bombs sink is because they're too heavy. To counter this, use lightweight ingredients such as cornstarch or baking soda. You can add some Epsom salts or sea salt but don't overdo it.
Use a mold with a flat bottom: A flat-bottomed mold will help your bath bomb stay upright and float more easily. Silicone molds with flat bottoms are a great option.
Avoid using too much liquid: Adding too much liquid to your bath bomb mixture can make it heavy and cause it to sink. Use only the amount of liquid needed to make your mixture stick together.
Use a combination of citric acid and baking soda: Citric acid and baking soda create the fizzing reaction that makes bath bombs fun. But if you use too much citric acid, it can cause your bath bomb to sink. Try using a combination of citric acid and baking soda, with more baking soda than citric acid, to make your bath bomb float.
Let your bath bombs dry completely: Once you've made your bath bombs, let them dry completely before using them. This will help them keep their shape and float better.
Consider adding a lightweight oil: A lightweight oil such as sweet almond or grapeseed oil can help your bath bomb float. Be careful not to add too much, as this can make your bath bomb sink.
Test and adjust: If your bath bombs aren't floating how you want them to, don't be afraid to experiment with different ingredients and ratios. Keep track of what you're doing so you can adjust as needed.
By following these tips and tricks, you should be able to make bath bombs that float and create a fun and relaxing bath experience.