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Science Project: Homemade Bath Salts

Nov 16, 2015

There's nothing quite like a nice relaxing bath, especially with the cold weather moving in. You could go out and buy bath salts for an extra soothing bath experience, or you could make your own! 

Why Bath Salts? 

  • Bath salts do a lot more than add a lovely scent to the water.
  • Most homes in North America have hard water, which means that the water is filled with minerals that react with your soap, preventing the soap from lathering nicely and leaving a lot of soap scum behind.
  • When you add bath salts to your water, the salt softens your water and allows you to get cleaner.
  • That's not the only reason to use bath salts; adding salt to your bath water is also better for your skin! Salt will prevent water from permeating your skin and causing those pruny fingers we all hate so much.

You can use colorant to make your bath salt a pretty color!You can use colorant to make your bath salt a pretty color!Courtesy of sayyes.com


  • 1 cup Epsom salt
  • 1 cup sea salt
  • 1/2 teaspoon glycerin
  • Essential oils
  • Colorant
  • Liquid soap

Essential oils are a great way to add a nice scent to your bath salts. Essential oils are a great way to add a nice scent to your bath salts. Courtesy of www.cappa.net


  • Mix the Epsom salt and sea salt together in a bowl, then add the glycerin and make sure it all gets thoroughly mixed together. 
  • Add a few drops of essential oil to make your bath salts smell nice. A rosemary scent will be invigorating, whereas a lavender might be a bit more calming. 
  • At this point, you can add a drop of skin-friendly colorant (available at most craft stores); this step is optional, depending on whether or not you want your salts to be colorful. 
  • You're done! Store your bath salts in a sealable container, like a small jar. 

Make sure everything gets totally mixed up!Make sure everything gets totally mixed up!Courtesy of howwemvontessori.com

Test Them Out

  • You can do an experiment to see how much your bath salts will help your soap lather. 
  • Wet your hands, add a drop of regular soap, and lather. Observe how much lather is created. Rinse hands. 
  • Fill your sink with warm water, adding about 1/8 cup of your homemade bath salts to it. Now wet your hands with this water, add some soap, and see how much lather is formed. Record your experiment and your findings for some extra credit in science class! 

Putting bath salts in water makes your soap lather better!Putting bath salts in water makes your soap lather better!Courtesy of grit.com

There you go! Now you're ready to relax in a hot bath. Don't forget, it's almost Christmas time and these homemade bath salts would make a great gift for your family and friends! Enjoy!

Have Your Say!

Would you ever make your own bath salts? Share your thoughts with us! 



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