Playing with Polymers

We have been making slime for such a long time but I have never blogged about it for a couple of reasons. 1: everyone else was doing it & 2: borax!!! We have tried so many methods to make slime including contact lens solution, liquid starch, laundry detergent, etc, but none of them made a good quality slime that would last more than a day. Borax seemed to be the only way to get a really good quality slime. In the end we found ELMERS MAGICAL LIQUID and despite being a bit pricey, it worked really well.

Anyway, that being said and after quite a few people asking, here is our slime recipe and supply list…

  • Cheap Mixing Bowl
  • Something to mix with that you don’t use for food, (we have cheap spoons in our science box, but thick lollipop sticks will work too)
  • Measuring Cups
  • Spray Bottle (optional, but we find that it adds the activator in more manageable amounts)
  • PVA Glue (we have more success with the white glue)
  • Shaving Foam
  • Gel Food Colouring
  • ELMERS Magical Liquid, (or borax powder)
  • Any mix-ins that you might like

We start off by measuring 1/2 cup PVA glue and 1/2 cup shaving foam and mixing them together in the bowl. We then add our gel food colouring and mix until we get the colour that we like, (you only need a few drops to get a vibrant colour). We then add the activator to a spray bottle and start adding 3 or 4 pumps at a time until the slime comes away from the side of the bowl.

Should you wish to make a borax solution, (I would recommend an adult do this part), we mix:

  • 1 tsp borax powder
  • 1 cup/250ml hot tap water

We mix until the powder has dissolved and then transfer to a spray bottle.

Here are a few pictures of slimes that we have made…

We used this thermochromic pigment in one of our slimes and it was so fun to watch it colour change with heat. 🙂
Because the polymers are crosslinked when the activator is added, if you pull it really fast the links will snap – this is a piece we snapped and it looked so fluffy inside!
Another snapped piece.
A piece that was allowed to stretch slowly, (over a tray before you cringe at it being on the couch, lol)
The next few pages are visuals that I made for my kids to explain the chemical reaction when slime is made.

I hope this helps all those that have been asking.

Happy sliming everyone! 🙂

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