Making Bath Bombs in High Humidity

Making bath bombs in humid conditions can have you pulling your hair out in no time. There is nothing worse than creating a beautiful bath bomb, only to come back to it later to see that it has warts or surface activation.

So what can you do? Here are a few tips.

Say goodbye to the salt.

If you’re using salt in your recipe, take it out. Salt is hygroscopic, meaning it absorbs atmospheric water (humidity). When working with salt in your formula, you might create the perfect bomb only to come back to it 10 minutes later to find it dotted with moisture and with an activated surface. This is the atmospheric water that the salt attracted, activating the baking soda and citric acid combination.

Add hardeners.

The base of any good bath bomb is a combination of baking soda and citric acid. To this you can add hardeners and fillers. Two really great hardeners are cream of tarter and kaolin clay. They make a bomb that firms up quickly so that it doesn’t have time to react as it dries. Kaolin clay also draws in the water so it doesn’t cause the bomb to react.

Use alcohol in your binder.

Alcohol is a great binder to use if it is humid where you live. It evaporates quickly leaving behind a hard bomb that you can package. You might have to try using different strengths of alcohol. I’ve found that using a 50/50 blend of alcohol and water (or simply 50% alcohol) helps to create a super-hard bomb that dries quickly. If you use 91% alcohol only, with no water, your bombs might come out powdery because the alcohol didn’t wet the mixture enough to create a hard bomb. You can also try a blend of alcohol and witch hazel.

Get a dehumidifier.

If your work area is humid, you might need to invest in a dehumidifier. You can run the dehumidifier in your work space or run it in a small closet and set your bombs in there to dry.

I put out a call for warty bomb pics in our group, Bath Fizz and Foam! So many great pictures were submitted!

Package quickly.

If your bombs make it to the point of drying and are ready to package, go ahead and package in airtight packaging. If you let your bombs sit out, they’ll just eventually pull in moisture from the air. Go ahead and shrink wrap or, at least, store in an airtight container until you can individually package.

Need a recipe? Give our Basic Bath Bomb Recipe a try! It includes hardeners and is salt-free.

Do you successfully make bath bombs in a high humidity area? We’d love to hear your tips and tricks! Please leave a comment!

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