Laundry Detergent (you can find this where laundry detergent is sold –
look hard, sometimes it’s hard to find)
Metal or Ceramic Bowl
Prepare the Elmer’s Glue Polymer:
In a bowl, measure ¼ cup Elmer’s Glue
Add ¼ cup Water
Add two or three drops of food coloring
Prepare the Cross Linking Agent
Put about ½ cup of water in a separate bowl, or in a drinking glass.
Add 3 tablespoons of Borax Powder.
Stir and stir until the cows come home.
all the powder disappears, then add some more borax – you are trying to make a
“saturated” solution – a solution in which no more powder can dissolve..
there is still some borax powder at the bottom of the glass, proceed – this is
supposed to happen – the solution is now saturated.
Make the Slime
add the cross linking agent to the Elmer’s Glue polymer using an eyedropper,
or a straw, or some other method to only add a few drops at a time.
(Note! Make sure you don’t
pick up any of the Borax powder at the bottom of the solution – all you want
is the borax dissolved in the water.) As
you add the cross linking agent, stir. When
the whole mass is cross-linked – you have slime!
probably best to play with your slime outside, as it will stick to carpets and
sofas, and boy! will your parents be mad if that happens!
When you are finished playing with it, just throw the slime in the trash.
has many different properties, can you make it bounce? Stretch it into
a thin sheet? Fold it up?
happens if you take a small cup and try to push the slime in? Does it
make a funny noise?
the slime is stretching - do you notice that it gets colder? Slime
stretching is an endothermic reaction. Just like a rubber band
stretching - try this too!
slime that you are making is a polymer. A polymer is a big, long molecule with
repeating units. For example, polyethylene – the polymer that makes up 2
Liter Cola bottles is made up of hundreds to thousands of ethylene molecules all
strung together in a line. (Ethylene
is a part of natural gas!). There
are lots of polymers all around you. Rubber
and cornstarch are examples of natural polymers. Most carpet is made of
polymers, and there are polymers in many types of clothing – polyester, lycra,
spandex are all examples of clothing polymers. Plastic is a general name applied
to polymers – so look around you! Polymers
are EVERYWHERE. Slime is a “cross
linked” polymer that is made by taking one polymer - the one that’s in
Elmer’s Glue – polyvinyl acetate – and “cross linking” it, forming a
Have questions? email us!
Watch us make SLIME!