How To Make Slime with Glue and Borax Polymer Reaction Explained
Introduction
Slime was initially a toy product prepared by An American Multinational Company Mattel. It is non-toxic, viscous, easy to squeeze, and made from gums. It can be easily prepared at home using glue. The only drawback is that it is so sticky in nature. It is not easy to remove it from carpets. In this article, we will discuss how to make slime with glue, how to make slime with clear glue, how do you make slime without glue, how to make good slime.
Now our question is how to make slime with glue. This method is the easiest way to make slime. It only takes 3-4 ingredients and will be made in a few minutes.
Slime Ingredients
7-ounce of clear school glue (We can use white glue also)
Food colouring
2 spoon saline solution
Baking soda
Steps
Take glue in one bowl and add food colouring. Stir until they are combined well. Then add some baking soda to it.
Add one spoon of saline solution and mix it until combined properly. We can add more saline water to make it thicker. But if a saline solution is less, it will be slimier.
Now store it in a zip bag or a box with a lid over it.
Now our slime is ready to play at home. If we want to learn how to make slime with glue, how to make slime easy, it is the easiest way.
How Do You Make Slime Without Glue or How to Make Water Slime?
Slimes can be made with glue or without it. Slime made with glue is so sticky, it is almost impossible to remove it from the surfaces when dried. So, there is another way to make it without glue. We can use any shampoo that is easily available at home. So, we will also learn how to make slime at home. Most shampoos are already coloured. So, we do not need to add any food colouring to it. We just need to replace the glue with shampoo in the above-mentioned procedure. Then we will add water as per requirement.
We can also add some cornstarch into water, it will make slime easier to stretch.
Though it won’t be as sticky as the one made with glue, we still need to keep it in a thin plastic zip bag or box.
How to Make Good Slime?
There are numerous ways to make slime. Here, we will discuss how to make good slime using some chemicals.
Material Requirements
Borax powder
White glue
Water
Spatula
Cups and bowls
Steps
Take the borax powder(10 ml) and add water(500 ml) to it; mix it until combined.
In another container, take glue and add water to it. Mix it until a clear solution is obtained.
Add food colouring to the glue solution. We can skip this part if we want to make our slime colourless.
Take the borax solution and start adding it to the glue solution. We will observe the constant changes while mixing.
Keep mixing it until it gets thoroughly mixed. Knead it with hands.
Our slime is ready to play. We can keep it in a zip bag or plastic box with a lid. Take it out when it looks mouldy.
Precautions
Do not add too much borax or glue. More chemicals can make it toxic. Keep it away from small children. Do not try to eat it. Wash your hands before and after preparing and playing with them.
FAQs on How To Make Slime at Home Step by Step
1. What is slime in chemistry?
Slime is a polymer-based gel formed when long-chain molecules are cross-linked to create a stretchy, semi-solid material. In most homemade slime recipes, the polymer is polyvinyl alcohol (PVA) from glue, and it reacts with borate ions to form cross-links between polymer chains. These cross-links trap water, giving slime its elastic, non-Newtonian texture. Slime is an example of a polymer cross-linking reaction in basic chemistry.
2. How do you make slime at home step by step?
You can make slime by mixing PVA glue with a borate-containing activator to form a cross-linked polymer gel.
- Step 1: Pour ½ cup of white school glue (contains polyvinyl alcohol) into a bowl.
- Step 2: Add a few drops of food coloring (optional).
- Step 3: Slowly add 1–2 teaspoons of borax solution (1 teaspoon borax dissolved in 1 cup warm water) or contact lens solution containing borates.
- Step 4: Stir until the mixture thickens and pulls away from the bowl.
The key chemical process is cross-linking between PVA chains and borate ions.
3. What ingredients are needed to make slime?
The basic ingredients for slime are PVA glue, water, and a borate-based activator.
- Polyvinyl alcohol (PVA) glue – provides long polymer chains.
- Borax (Na2B4O7·10H2O) solution or contact lens solution – supplies borate ions.
- Water – acts as a solvent.
- Optional: food coloring or glitter.
The essential chemistry involves borate ions forming cross-links between polymer chains in the glue.
4. What is the chemical reaction involved in making slime?
The chemical reaction in slime making is a cross-linking reaction between polyvinyl alcohol (PVA) and borate ions.
- Borax dissolves in water to produce borate ions.
- Borate ions form hydrogen-bonded bridges between PVA chains.
- This creates a three-dimensional polymer network.
The result is a viscoelastic gel, where polymer chains are loosely connected, giving slime its stretchiness.
5. Why does slime become stretchy and elastic?
Slime is stretchy because cross-linked polymer chains can move past each other but remain connected.
- The PVA chains are long and flexible.
- Borate ions create temporary cross-links between chains.
- When pulled slowly, chains slide and stretch.
- When pulled quickly, bonds resist movement and may break.
This behavior makes slime a non-Newtonian fluid with both liquid and solid properties.
6. What is borax and what is its formula?
Borax is a hydrated sodium borate salt with the chemical formula Na2B4O7·10H2O.
- It dissolves in water to produce borate ions.
- Borate ions interact with hydroxyl groups in PVA.
- It acts as a cross-linking agent in slime chemistry.
Borax is commonly used in cleaning products and simple polymer chemistry demonstrations.
7. Can you make slime without borax?
Yes, you can make slime without pure borax by using other sources of borate ions such as contact lens solution or liquid starch.
- Contact lens solution contains boric acid and sodium borate.
- Liquid starch may contain cross-linking agents.
- These still react with PVA glue to form slime.
Chemically, the key requirement is a substance that provides borate ions for polymer cross-linking.
8. Is making slime a chemical or physical change?
Making slime is mainly a chemical change because new cross-links form between polymer chains.
- The PVA polymer structure changes due to borate bonding.
- A new gel network is formed.
- The properties differ from the original glue solution.
Although no new small molecules are produced, the formation of cross-links makes it a chemical process rather than just mixing.
9. What type of polymer is used in slime?
The polymer used in most slime recipes is polyvinyl alcohol (PVA), a synthetic water-soluble polymer.
- PVA contains repeating –CH2–CHOH– units.
- It has many hydroxyl (–OH) groups.
- These hydroxyl groups allow bonding with borate ions.
Because of these functional groups, PVA easily forms cross-linked networks in slime chemistry experiments.
10. Why does slime sometimes become too hard or too runny?
Slime becomes too hard if there is excess activator and too runny if there are insufficient cross-links.
- Too much borate: excessive cross-linking makes slime stiff and rubbery.
- Too little borate: not enough cross-links, so the mixture stays liquid.
- Adjust by adding small amounts of glue or activator gradually.
The texture depends on the degree of polymer cross-linking in the slime mixture.
