The classic slime is the borax slime recipe! Used for years, this slime making gem of a recipe makes the most amazing stretchy, squishy slime once you find the correct ratio. We think we have, and we want to share it with you. Try this classic homemade slime recipe the next time you want to make homemade slime.

BORAX SLIME RECIPE FOR CLASSIC HOMEMADE SLIME!

The classic slime is the borax slime recipe! Used for years, this slime making gem of a recipe makes the most amazing stretchy, squishy slime once you find the correct ratio. We think we have, and we want to share it with you. Try this classic homemade slime recipe the next time you want to make homemade slime.

IS BORAX SLIME SAFE?

The borax slime recipe does get a bad rap, but done correctly it should not be harmful at all. This slime recipe has been floating around for years, and while I don’t suggest using it daily, I do think it’s worth a try.

If you have sensitive skin, you may want to wear gloves or skip it and try one of our other basic slime recipes. They also contain borons but may be gentler on your skin. If you do have an issue with laundry detergents, I also suggest you skip this in favor of one of our other recipes.

Most slime recipes are going to use some form of borons as slime activators. Unless you are going for taste safe slime, you need to use some form of boron like borax powder, sodium borate, or boric acid to form the slime.

I always recommend that adults handle the borax powder while supervising their kids. This is NOT taste safe. Please don’t eat this slime, and make sure to wash hands and works surfaces thoroughly.

This past week, we have had some fun experimenting with the ratio of borax powder to water and found that we if we used a bit less borax, we made an even stretchier slime.

Clear glue definitely needs the new ratio as I have already noted in our CLEAR GLUE SLIME RECIPE, but white glue is a bit more forgiving.

WATCH THE SLIME VIDEO! (This slime making video uses clear glue but white works just fine too!)

BASIC SLIME RECIPES 

All of our holiday, seasonal, and everyday slimes use one of five basic slime recipes that are super easy to make! We make slime all the time, and these have become our go-to favorite slime recipes!

I will always let you know which basic slime recipe we used in our photographs, but I will also tell you which of the other basic recipes will work too!  Usually you can interchange several of the ingredients depending on what you have on hand for slime supplies.

Here we use our Borax Slime recipe.  Slime with borax powder is one of our favorite sensory play recipes!  We make it ALL the time because it is so quick and easy to whip up.   Three simple ingredients {one is water} are all you need.  Add color, glitter, sequins, and then you are done!

Where do I buy borax powder?

We pick up our borax powder in the grocery store! You can also find it on Amazon, Walmart, Target.

Now if you don’t want to use borax powder, you can absolutely test out one of our other basic recipes using liquid starch or saline solution. We have tested all these slime recipes with equal success!

NOTE: We have found that Elmer’s specialty glues tend to be a bit stickier than Elmer’s regular clear or white glue, and so for this type of glue we always prefer our 2 ingredients basic glitter slime recipe.

BORAX SLIME RECIPE

I always encourage my readers to read through our recommended slime supplies list and How To Fix Slime Guide before making slime for the first time. Learning how to stock your pantry with the best slime ingredients is easy!

YOU WILL NEED:

  • 1/2 cup Clear or White PVA School Glue
  • 1/4 tsp Borax Powder {found in the laundry detergent aisle}
  • 1 cup of Water
  • Food coloring, confetti, glitter, and other fun mix-ins (CHANGE FOR RECIPE)

No more having to print out a WHOLE blog post for just one recipe!

Get our basic slime recipes in an easy to print format so you can knock out the activities!

—>>>  FREE SLIME RECIPE CARDS

HOW TO MAKE SLIME WITH BORAX:

STEP 1:  In a bowl mix 1/2 cup water and 1/2 cup of glue.  Mix well to combine completely.

STEP 2: Now’s the time to add (color, glitter, or confetti)! Remember when you add color to white glue, the color will be lighter. Use clear glue for jewel toned colors!

STEP 3: Make up your slime activator by mixing together 1/4 tsp borax powder and 1/2 cup warm water in a separate bowl.   Hot tap water is fine and does not need to be boiled. This step is best done by an adult.  Spend a minute stirring to make sure the borax powder is well mixed in.

STEP 4: Add the borax slime activator solution {borax powder and water} to the glue/water mixture. Start stirring!  Your slime will begin to form instantly. Keep stirring until your slime has formed and remove immediately to a dry container.

With our new ratio of borax powder to water, you should not have any leftover liquid in the bowl. If you do keep stirring. With higher ratios of borax to water, you may have leftover liquid.

STEP 5:  Start kneading your slime! It will appear stringy at first but just work it around with your hands and you will notice the consistency changes. 

You can knead the slime in the bowl before you pick it up as well. This slime is stretchy but can be stickier. However, keep in mind that although adding more activator (borax powder) reduces the stickiness, it will eventually create a stiffer slime.  You can always add but you can’t take away!

MAKE A SLIME SCIENCE EXPERIMENT

Here we used about 6 drops of neon food coloring in pink, blue, and purple. We tested several ratios of borax to water including a 1/4 tsp, 1/2 tsp, and 1 tsp to 1/2 cup of hot water.

This was an excellent slime science experiment (see more ideas here), and we made three batches of equally awesome but different slimes. It’s a great lesson in mixtures, polymers, and viscosity.

As you might imagine, the less borax used the looser or slimier the slime. The more borax used the thicker more putty like the slime.

Note: white glue is best for this type of experiment. Clear glue slime tends to crumble if it gets too thick.

Read more on the science behind the slime below and grab a free printable slime recipe cheat sheet with our four basic slime recipes!

 

SWIRLING SLIME TIP

We made full slime recipes but then divided them in half so we could enjoy the swirl process a little longer. You can even get a cool tie-dye effect if you pick up the swirled colors gently and stretch them out!

The first set of slime we layered into a mason jar and slowly pure it all out! The colors mixed and mingle with each other as they cam out of the jar.

The second set of slime we played out in strips on our tray. All you need to do is pick up the three ends with your fingers, lift straight up and swirl around on the tray. Squish it, stretch it, mix it!

You will simply end up with purple slime in the end, and it will be a huge amount.

blue borax slime on table with hand squishing it

 

HOW DO YOU STORE SLIME?

Slime lasts quite awhile! I get a lot of questions regarding how I store my slime. We use reusable containers in either plastic or glass. Make sure to keep your slime clean and it will last for several weeks. I love the deli-style containers I have listed in my recommended slime supplies list.

If you want to send kids home with a bit of slime from a camp, party, or classroom project, I would suggest packages of reusable containers from the dollar store or grocery store or even Amazon. For large groups, we have used condiment containers and labels as seen here.

We have the best resources to look through before, during, and after making your borax slime! Make sure to go back and read the slime science above too!

BORAX SLIME SCIENCE

We always like to include a bit of homemade slime science around here!  Slime is an excellent chemistry demonstration and kids love it too!   Mixtures, substances, polymers, cross-linking, states of matter, elasticity, and viscosity are just a few of the science concepts that can be explored with homemade slime!

What’s slime science all about?  The borate ions in the slime activators (sodium borate, borax powder, or boric acid) mix with the PVA (polyvinyl acetate) glue and forms this cool stretchy substance. This is called cross-linking!

The glue is a polymer and is made up of long, repeating, and identical strands or molecules. These molecules with flow past one another keeping the glue in a liquid state. Until…

You add the borate ions to the mixture,  and it then starts to connect these long strands together. They begin to tangle and mix until the substance is less like the liquid you started with and thicker and rubberier like slime! Slime is a polymer.

Picture the difference between wet spaghetti and leftover spaghetti the next day. As the slime forms, the tangled molecule strands are much like the clump of spaghetti!

Is slime a liquid or solid?

We call it a Non-Newtonian fluid because it’s a little bit of both!  Experiment with making the slime more or less viscous with varying amounts of foam beads. Can you change the density?

Did you know that slime aligns with the Next Generation Science Standards (NGSS)? 

It does and you can use slime making to explore states of matter and its interactions. Find out more below…

MORE SLIME MAKING RESOURCES!

You will find everything you ever wanted to know about making homemade slime right here, and if you have questions, just ask me!

HOW TO FIX STICKY SLIME

HOW TO GET SLIME OUT OF CLOTHES

21+ EASY HOMEMADE SLIME RECIPES

SCIENCE OF SLIME KIDS CAN UNDERSTAND!

READER QUESTIONS ANSWERED!

FREE PRINTABLE SLIME LABELS!

THE AMAZING BENEFITS THAT COME OUT OF SLIME MAKING WITH KIDS!

No more having to print out a WHOLE blog post for just one recipe!

Get our basic slime recipes in an easy to print format so you can knock out the activities!

—>>>  FREE SLIME RECIPE CARDS

 

TRY OUT YOUR OWN BORAX SLIME RECIPE EXPERIMENT!

Try more fun homemade slime recipes right here. Click on the link or on the image below.

liquid starch slime homemade recipes

 

2 Comments

  1. FInally, a simple recipe for a first timer!!!! Thank you sssooo much and my kids definitely thanks you too because this is the first time I’ve let them make it lol

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