Polymer Journal 4

In total we made 3 prototypes. Our end product is called Eco-Dough, and will be packaged in environmentally friendly paper bags lined with wax. You can purchase it for 20 Kuai per bag or it will be shipped to manufacturers in bulk.

Prototype 1:

3 tbs cornstarch

1 tbs water

Microwaved for a total of 40 seconds on medium heat

  • Very crumbly
  • Very cracked (after the crack test where we let it out to dry)
  • Not very bouncy
  • Dried extremely fast
  • Developed a hard ‘skin’ around the clay while it dried

One strength from this prototype is the hard skin proving that it will dry to be a strong material. All other observations are properties that are not desired in the final product. Since it was crumbly and had a fast dry time,  it would not allow the user to make their own toys successfully. 

Prototype 2:

2 tbs cornstarch

1 tbs guar gum

50 ml water

Microwaved for a total of 30 seconds on light heat

  • Squishy
  • Flexible
  • Holds its shape
  • Bouncy
  • Too sticky
  • Did not crack very much during crack test

The only limitation from this prototype was that it was too sticky. If the clay is too sticky, then molding toys with it will be extremely hard. All other properties such as its flexibility and its ability to hold its shape are all properties of polymer clay and is what we are looking for.

Prototype 3:

6 tbs cornstarch

2 tbs guar gum

40 ml water

Microwaved for a total of 40 seconds on light heat

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

Because of prototype 2’s  limit of the clay was too sticky, we decided to add less water so it would not be as sticky but microwaving it for less so it wouldn’t be too dry. The end product was exactly what we were looking for, a clay that had all properties of polymer clay but was 100% eco-friendly and safe. We have concluded that prototype is the best prototype out of all three.

Here is the table we used to record our data

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