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Home / Science projects / How To Make Slime
  • How To Make Slime

    How To Make Slime

    Homemade Slime

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    This is a fun and easy slime to make. Make it with white glue for opaque slime, or glue gel for translucent slime.

    What You Need:

    • Elmer's white glue or Elmer's school glue gel
    • Borax (find in the laundry detergent aisle of the store)
    • Water
    • Two bowls
    • Food coloring (optional)

    What You Do:

    1. In one bowl mix 1/2 cup (4 oz) glue and 1/2 cup water. Add food coloring if you want colored slime.
    2. In the other bowl, mix 1 teaspoon borax with 1 cup water until the borax is dissolved.
    3. Add the glue mixture to the borax solution, stirring slowly.
    4. The slime will begin to form immediately; stir as much as you can, then dig in and knead it with your hands until it gets less sticky. (No one makes slime without getting a little messy!) Don't worry about any leftover water in the bowl; just pour it out.

    What Happened:

    The glue has an ingredient called polyvinyl acetate, which is a liquid polymer. The borax links the polyvinyl acetate molecules to each other, creating one large, flexible polymer. This kind of slime will get stiffer and more like putty the more you play with it.

    Store it in a plastic bag in the fridge, to keep it from growing mold.

    Super Slime

    This slime is similar to the one above, but creates a less rubbery and more transparent slime. This is the real gooey deal! (This slime is non-toxic, but still keep these chemicals away from unsupervised children and wash your hands after playing with the slime.)

    What You Need:

    What You Do:

    1. Make a 4% solution of polyvinyl alcohol: Stir 1.5 teaspoons (approx. 4g) of PVA into 1/2 C (approx 100 ml) of water in a large microwave-safe bowl. Cover the bowl and microwave for 1 minute, then stir. Microwave another 30 seconds and stir. Continue until all the PVA is dissolved. A slight film may have formed on top; you can remove that with a spoon. You can add food coloring if you want colored slime. Allow the solution to cool.
    2. Make a 4% borax solution by stirring a little less than 2 teaspoons (approx. 4g) of Borax into 1/2 cup of water.
    3. Pour the cooled PVA solution into a ziplock bag and add 2 teaspoons (10ml) of the borax solution.
    4. Zip the bag and knead it until the chemicals are mixed into slime. Then scoop it out and play with it. 

    What Happened:

    While water is a liquid made up of individual H2O molecules, polyvinyl alcohol is formed of long chains of connected molecules, making it a liquid polymer. (The term polymer comes from the words for "many parts.") The borax acts as a "cross-linker," linking the individual PVA chains to each other so they connect to form a blob of slime. It does this linking job when the borax molecules form hydrogen bonds with molecules present in the PVA chains. (The partial positive charge of hydrogen atoms attracts the partial negative charge of oxygen atoms.) Since hydrogen bonds are weak, they can break and reform as you play with the slime or let it ooze on a flat surface.

    Your slime will last for a while if you seal it in a plastic bag and keep it in the fridge.

    Other fun home recipes:

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By: Odee bee
Date: Nov 17, 2015

So fun I had to make a snall batch just for me…great science project! I look forward to exploring your site.

By: cheyenne
Date: Nov 08, 2015

Do we have to use borax and food coloring!!!!!!!!!!

[HST adds:  For this kind of slime yes, you would need borax, but there are other recipes out there that don’t use it.  You don’t have to use food coloring but it can be fun.  Check out this slime you can make with milk, vinegar and baking soda - http://www.hometrainingtools.com/a/polymer-slime-science-projects ]

By: Ashefa
Date: Nov 07, 2015

This is the perfect slime

By: Melanie Mejias
Date: Nov 07, 2015

      My daughter bring home slime from school she made it with her friend and i started playing with it and i relize it is so addictive and it calms your brain.

By: Unicorn person
Date: Oct 23, 2015

this is amazing i love it so much i am playing with this right now ha ha thanks!

By: Florence Eng
Date: Oct 19, 2015

does this recipe make two cups of slime?  if i want less, can i cut the recipe in half?

thank you!!

[HST adds:  There will be some leftover water after the ingredients are mixed, it will make a little less than two cups.  The recipe can be halved or doubled to change the resulting amount of slime.  Hope this helps!]

By: miss mimmy
Date: Oct 18, 2015

i love this but its gooey

By: Frank
Date: Oct 14, 2015

Thank you SO much for this! I used it for my technology project. [S.T.E.M. Expo] I got an A+! [For research, but model helped a lot to explain].
Corning was there, and I was on the news. I did so well I was chosen to represent our school! Wish me good luck!

By: Gilbert Saiz
Date: Oct 09, 2015

This will go great for my Science Project

By: Kim
Date: Oct 07, 2015

If you don’t put food coloring in will it become see Through?

[HST Adds:  If you use white glue, the slime will not be clear.  Making it with a clear gel glue would make it slightly transparent.  Hope this helps!]