November 30, 2023


Science Of Woman

DIY Bathtub Bombs Suggestions & Tips!

7 min read

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On this publish I’m going to offer you step-by-step directions on the way to make your individual diy bathtub bombs! This selfmade bathtub bomb recipe is tremendous simple to make and so enjoyable to make use of! Create a spa-like expertise with a pleasant heat bathtub, a glass of wine and selfmade fizzy bathtub bombs!  This enjoyable bathtub bomb undertaking accommodates simple to seek out, pure elements that come collectively for an expensive bathtub time expertise. 

Large jar with bath bombs

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Ever had a kind of DIY makes an attempt the place every part went fallacious and what was alleged to be simple changed into a 2 day lengthy ordeal? That is the way it went with studying to make my very own bathtub bombs. First I used to be unprepared with elements and didn’t have sufficient citric acid. Then I didn’t have sufficient corn starch. Subsequent, I rapidly found I purchased the worst molds! I re-made and re-worked my DIY bathtub bombs 3 instances! Let’s simply say, I realized lots of what do to do and what to not do! I employed my daughters helps since they’re residence for the summer time as properly so between the three of us, we received bathtub bombs found out and have all the guidelines and methods so you can also make the right bathtub bomb with out the trial and error!

The Science Behind Bathtub Bombs:

The two elements you could have to be able to make your individual bathtub bombs are citric acid and baking soda. A chemical response happens between these 2 elements and you could have them each. All different elements should not 100% needed.

According to Live Science

The fizziness of bathtub bombs comes from the chemical reactions that occur when the baking soda and citric acid come into contact with water, Wooden-Black advised Stay Science. Baking soda, or sodium bicarbonate, has the chemical components NaHCO3. In water, baking soda rapidly dissolves, and the positively charged sodium (Na+) breaks other than negatively charged bicarbonate (HCO3-). [Goopy Science: How to Make Slime with Glue]

In the meantime, the citric acid additionally dissolves, with a single hydrogen ion (H+) separating from the remainder of the molecule, Wooden-Black stated. Then, that positively charged hydrogen from the citric acid and the negatively charged bicarbonate from the baking soda mingle, in a short time present process a sequence of reactions. One of many finish merchandise is carbon dioxide (CO2). As a result of carbon dioxide is a fuel, it varieties small bubbles within the bathtub water, creating a pleasant fizz.

To make bathtub bombs, you could use 1 half citric acid to 2 components baking soda. For instance, should you use 1 cup of baking soda, you’ll want 1/2 cup citric acid. 

Additionally, per 2 cup of dry elements add about 1-2 teaspoons of liquid. On this bathtub bomb recipe, you could add the liquid slowly checking to get the proper consistency. You wish to barely moisten the combination in order that the powder sticks collectively. Nonetheless, don’t fret should you get an excessive amount of liquid-just add extra baking soda! 

Different DIY Bathtub Bomb Substances:

Epsom Salt is a pure ingredient so as to add to your bathtub for mineral absorption and detox. 

Cornstarch in a shower bomb merely slows down the response between the baking soda and citric acid. By binding to the baking soda in addition to the citric acid, the cornstarch slows down the speed at which each of them dissolve. The cornstarch prolongs the bathtub bomb motion. The fizziness may find yourself lasting 2-4 minutes quite than a couple of seconds!

Bath bombs on white background

I made 3 completely different batches with completely different important oil mixtures, completely different colours and completely different dried herbs. I added lavender buds to the purple bombs and chamomile flowers and rose petals to the yellow bombs. You may sprinkle herbs on the underside of your mildew so they’re seen on the completed bomb or you may combine them into your combination so they’re a shock as soon as they hit a heat bathtub!

Simply bear in mind no matter you place in your bathtub bomb has to go down the drain!

Get artistic and add your individual private contact! This straightforward bathtub bomb recipe would make an amazing present!!

You could be considering my DIY Firming Physique Oil recipe. It’s the right physique moisturizer for after the bathtub!

DIY Bath Bomb Ingredients

What You’ll Must Make DIY Bathtub Bombs


  • 1 cup Baking Soda
  • 1/2 cup Citric Acid
  • 1/2 cup Epsom Salt
  • 1/2 cup Cornstarch
  • 1-1 1/2 teaspoon coconut oil
  • 1-1 1/2 teaspoons water
  • 10 drops important oil of your selection *elective
  • 2-4 drops meals coloring *elective
  • Dried herbs or petals *elective


  • Metallic Bathtub Bomb Molds
  • Giant Bowl
  • Small Bowl, cup or jar
  • Whisk


    1. Add baking soda, citric acid, Epsom salt and cornstarch in a big bowl.
    2. Combine dry elements properly.
    3. Soften coconut oil in a double boiler (fill a medium sized pot half method full with water and gently warmth your coconut oil on medium warmth)
    4. In a separate small bowl or jar, add moist elements together with meals coloring and important oil.
    5. Combine your liquid elements properly till the colour and important oils are evenly dispersed.
    6. SLOWLY add the liquid combination into the dry combination stirring the complete time. We do not need the citric acid to get activated by the liquid.
    7. Examine that your ultimate combination clumps collectively. Suppose-wet sand. However do not get too moist! We simply need to have the ability to clump the combination collectively when compacted.
    8. Utilizing chrome steel molds, pack within the combination into every mildew half.
    9. Sprinkle further bathtub bomb combination loosely on high of the molds and press combination within the molds collectively.
    10. Twist and take away molds. Faucet the mildew to loosen the bathtub bomb for simpler removing.
    11. Place bombs on parchment paper and permit to dry for 24-48 hours.

    Bowl of dry ingredients

    Dripping food coloring in small jar of liquid

    Pouring liquid into white powder mixture

    Hand clumping white powder

    Hands putting mixture into a mold


  • You will need to notice that bathtub bomb making shouldn’t be accomplished in a damp atmosphere. This undertaking isn’t the right wet day exercise.
  • The shelf lifetime of bathtub bombs is 6 months. Citric acid will begin to lose it is fizzy energy after too lengthy.

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Mould Choices:

3 yellow diy bath bombs made from muffin tins

Colour Concepts:

*At all times add mica powder into your liquid since inhaling mica might be hazardous.

Scent Choices:

Jar of Bath Bombs by Bath Tub

Troubleshooting DIY Bathtub Bombs:

  • In case your bombs are too moist you may add extra baking soda. 
  • In case your bomb is crumbling and never staying collectively, add extra moist elements. Do that rigorously. You may fill a twig bottle with water, witch hazel or alcohol and spray your combination to make sure you don’t add an excessive amount of water.
  • If the bomb fluffs up you’ve added an excessive amount of liquid or added liquid too quick.
  • If the bomb is gentle, it wasn’t packed down sufficient or it was too moist.
  • If the bomb has bumps the moist and dry elements weren’t combined properly sufficient.
  • If the bomb cracks down the center, it was not molded correctly. I heard that should you shrink wrap it and wait 24 hours, it’ll come again collectively.
  • If the bomb sticks to the mildew the combo was too moist.
  • If the bomb doesn’t float, it’s more than likely not dry sufficient. Bombs can typically take a number of weeks earlier than they’ll float.

More often than not you may crumble up the bomb right into a bowl and tweak the combination. Not all is usually misplaced should you make a mistake with bathtub bombs! Don’t throw it out simply but!


As a substitute of coconut oil, be happy to make use of olive oil, almond oil, avocado oil, castor oil and many others.

I wish to omit cornstarch in my subsequent batch and am pondering of utilizing coconut milk powder as an alternative. From all that I’ve researched I’m positive it’ll work nonetheless, I haven’t tried it but.

So long as you retain the proportions of liquid to powder and don’t omit baking soda or citric acid, you may mess around with elements to be able to obtain completely different advantages and reactions out of your bombs.

A Few Bathtub Bomb Tips!

  • Strive utilizing castile cleaning soap as your liquid for many foamy bubbles!
  • For extra nourishment, use all oil on your liquid proportion.
  • Take about 1/4 cup of a tough butter like cocoa or kokum (dry, not melted). Cowl the butter with baking soda and finely chop the butter ensuring it’s coated in powder. Add it to your dry combination. Butter will soften in a sizzling bathtub and provides further nourishment for dry pores and skin!
  • You may separate a batch into a number of smaller batches, add completely different shade to every batch and layer the completely different colours to make a stunning bathtub bomb!
  • Utilizing a tablespoon to indent insides of each halves of the mildew then fill the indention with one other coloured batch of bathtub bomb combine in order that while you use it, a shock shade is inside. 

Whereas I had a tough go of constructing bathtub bombs because of the flimsy plastic molds, I’m planning to purchase the correct steel molds and experiment extra. I discovered a Youtube channel referred to as Creative Bath Lab and he or she is the queen of all issues bath-especially bathtub bombs. She makes probably the most artistic excellent bathtub bomb each time!

Like I stated, what I assumed was going to be a straightforward selfmade bathtub bombs undertaking turned out to be tough and cumbersome so I took to the web looking for solutions. This posts compiles all that I’ve realized. Total, my daughters and I loved this DIY and might’t wait to make extra!

Take to the feedback when you’ve got your ideas or questions!!

xx, Jenni

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