Rainbow Bath Bomb Recipe

 Oct 10,2022

Ethereal Rainbow Bath Bomb Recipe that will have you feeling heavenly! Create gorgeous, magical coloured bath bombs with this easy recipe and science lesson for kids.

If you wish to have a darker, richer rainbow coloured mix, I highly recommend using some mica powder in addition to the colourants. This will really enrich your colours making them very vibrant. I actually love the more delicate, ethereal rainbow colours, but the choice is yours!

Rainbow Bath Bomb Ingredients

2 cups baking soda
1 cup citric acid
1/4 cup cornstarch
1/4 cup dead sea salts
1/3 cup coconut oil
1 tablespoon polysorbate 80
1 tablespoon Shea butter
20 drops each of orange and lemon grass essential oil
Red, Orange, Yellow, Green, Blue and Purple colorant
Stainless steel bath bomb molds
Spray bottle filled with rubbing alcohol
1 large mixing bowl
1 microwave safe bowl
6 small mixing bowls

How to Make a Rainbow Bath Bomb with Layered Colours

Creating the mix

Start with your large mixing bowl. Add the baking soda, citric acid, dead sea salts and cornstarch. Mix the dry ingredients together with a spoon or your hands. Make sure you break up any chunks. Use caution with citric acid. It likes to become airborne with enthusiastic helpers and can be a bit of an irritant when inhaled.
In the microwave safe bowl, melt your coconut oil and shea butter in short increments in the microwave. Don’t let it boil, usually about 20 to 30 seconds is enough. Stir.
Add the polysorbate 80 and Essential Oils to the coconut oil and shea butter. Stir.
Pour the liquid into the dry mix bowl.
Mix it really well with your hands. Really work it all together until it takes on the consistency of wet sand and holds a shape when you squish it with your hand.

Colouring the mix

Divide the mix evenly between the 6 bowls.
Add 2 drops of red colour to the first bowl. We very careful. Since we are using liquid colours in this bath bomb recipe it will trigger the chemical reaction. If this concerns you, or you want darker colours, see below for tips!
Mix the colour in thoroughly.
Repeat in the next bowl with orange, then yellow, green, blue and purple. Until you finally have 6 coloured bowls.

Packing the Molds

Hold half of the mold in your hand. Add some red mix until it is about 1/3 full. Then add orange mix, then yellow. Make sure it is loosely heaped.
Then repeat on the other side, starting with purple, then blue and finally top it off with green, again making sure it is loosely heaped.
Bring the two halves together and press together firmly. Use a twisting motion to release any excess mix.
Tap the ends and release the mold. Set it on parchment paper in a warm, dry place and let harden for at least 24 hours.

Storing and using rainbow bath bombs

Once hard and set, place your bath bombs in an air tight container. When you are ready to use the bath bombs, run a nice warm bath, climb in and add the bath bomb to the water. See how it fizzes and colours the bath water!

Where to buy rainbow bath bomb

Making rainbow bath bombs yourself may be a bit complicated. If you want to easily have them, you can choose to buy them directly, either at offline stores or online shopping platforms. If you're looking to purchase in bulk or even customize private label rainbow bath bombs, you can contact a bath bomb manufacturer. Boymay Cosmetics Co., Ltd. is one such manufacturer that offers wholesale and OEM one-stop services for rainbow bath bombs. With over 10 years of experience in bath bomb research and production, we have an experienced trade team that can provide you with comprehensive services, including free samples and free packaging design. Contact us today to submit your cooperation request.

If you find it tedious to make your own rainbow bath bombs, you can buy the products directly from our website.