Polymer Journal 5

Final Procedures:

Which Prototype Was The Most Successful?


Prototype 3 was the most successful because it had the most cornstarch to guar gum ratio.


Pototype 2-

2 tbs cornstarch, 1 tbs guar gum

  • Squishy
  • Flexible
  • Holds its shape
  • Bouncy
  • Too sticky

Prototype 3-

6 tbs cornstarch, 2 tbs guar gum

  • Squishy
  • Soft
  • Flexible
  • Holds its shape
  • Dries hard and strong



For our final polymer we wanted a clay that was squishy, soft, flexible and had the ability to hold its shape. When you add water to the guar gum and cornstarch mixture, it allows the particles to move around and form long chains. After, when microwaved, the long chains grabbed onto each other forming the clay itself. In prototype two, the cornstarch to guar gum ratio was 2:1 while in prototype 3 the ratio was 3:1. According to the data collected, it proves that in prototype 2 because there was too much guar gum the polymer was observed as too sticky. In prototype 3 there is much more cornstarch in the mixture giving the polymer clay a dryer and more desirable texture.


For this product we wanted to create a 100% eco friendly and safe polymer clay that could potentially replace the plastic in plastic toys. We started with the clay base, cornstarch and water. It was not stretchy enough so we added guar gum and altered the ratios to make the perfect polymer clay. After we made each prototype we put them through the ‘crack test’ where we let them dry and picked out the one prototype that cracked the least when dry.

For our pitch, our main goal was the idea of replacing plastic in toys with this eco friendly and safe polymer clay. In our pitch we also talk about how it is made, and the science behind it, presenting the audience with physical examples of our polymer clay.

Our polymer is 100% sustainable because it is made of all natural ingredients (cornstarch, guar gum and water).

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