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Add a few drops of your chosen colors to their respective bowls and mix. Add more if you desire a stronger color. Then put them to one side for a bit, this should allow them to dry while we get on with other things.
Mix all of the dry ingredients (excluding the dyed Epsom salts) together in a large mixing bowl. Give it a mix so the ingredients are combined, and crush any clumps between your fingers.
Now it’s time to add the wet ingredients to the bowl. Go ahead and add the sweet almond oil first, followed by the polysorbate 80.
Give it a thorough mix. We shouldn’t have too much about disturbing the bicarb and the citric acid here, as this recipe doesn’t call for any water (although it may do later on).
Now, add your chosen fragrance oil. For this, I’m using a mix of raspberry, strawberry and vanilla. I like to call this my ‘cream berry burst’ blend of fragrance oils. But of course, use whatever you like best. Once added, mix again thoroughly so the fragrance is well distributed.Before we add the Epsom salts, give the bath bomb mixture a feel, squeezing some of it between your hands. It should hold together like lightly damp sand. If it feels too dry, add a half teaspoon of water (although only a bit at a time and mixing in between).Once you’re happy with the consistency, go ahead and add the dyed Epsom salts. I like to add them a handful of each at a time, as this just helps a bit with the distribution of colors. Then mix as thoroughly as possible.
Now for the hard part, getting that cannonball-like shape! Fill both halves of your bath bomb mold so that they are overflowing with mixture
Then force the two halves together (without losing too much of the mixture). The reason we want it piled high is that as we force the halves together, the compression of the powdered mixture will create a smooth external surface and fuse the two halves of your bath bomb together.
Once I’ve pushed them together very tightly, I like to tap both sides of the mold gently, just to loosen them. You should then be able to slide one half off and gently set it (mold side up) onto a flat surface. You should be able to slide the other half off once it’s sitting happily. If you find that your bath bombs crumble at this stage, you may want to put the mixture back in the bowl and add a half teaspoon of water (as discussed earlier).
You’ll want to leave your confetti bath bombs to dry for a couple of days. Drying times will vary depending on the environment. The wetter and more humid it is where you are the longer it will take. For this reason, I don’t tend to leave these to dry in the kitchen or anywhere near a bathroom, as these are usually the more humid areas of any home.
Ingredients in these quantities should get you anywhere from 8-10 homemade bath bombs depending on the size of your molds. Just keep going until you've used up your ingredients, you'll find uses for them I'm sure. You can use whatever essential oil, fragrance oil or color dye you like, although I do think Peach Kernal works the best for this recipe.