Tuesday, May 11, 2010

Mini Project Making play dough



Photo Credit: Kevin Chan 5th
In chemistry class with a mix of brilliant mixtures I made Play-Dough!!! Here the trick:
  • First of all put a solution on the a hot plate.
  • Put the flour down on it.
  • Heat this flour and mix it by stirring this flour.
  • Drop in some food coloring to add an effect for color.
  • Keep Mixing until dough is ready and heated.
  • Turn of the burners and let it set. Soon you will have Play-Dough!!!
Science: The chemicals mixed form a compound the compound is essentially a starch-based binder mixed with water, salt, lubricant and preservative. To be more specific, it contains:
  • Water
  • Starch-based binder
  • Retrogradation inhibitor
  • Salt
  • Lubricant
  • Surfactant
  • Preservative
  • Hardener
  • Humectant
  • Fragrance
  • Color
Each of these ingredients has an effect on the compound's texture, fragrance and appearance. One of the major contributors to the softness and texture of Play-Doh compound is the interaction between its two primary ingredients - starch-based binder and water. To understand how the dough works, you have to know a little about starch and what happens when it comes into contact with water.Starches are polysaccharides, or strings of sugar molecules.

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