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SCIENCE - what is the function of salt in homemade play dough?

(10 Posts)
suzywong Mon 03-Nov-08 13:38:12

Was making it with kids today and talking about the gluten, the oil, the water and then ds1 asked what the salt was for.


FruitynNutty Mon 03-Nov-08 13:42:53

I think it heps to preserve the playdough.
Also, it deters children from eating it, yuck!

FruitynNutty Mon 03-Nov-08 13:43:11

helps obv

fishie Mon 03-Nov-08 13:43:33

oh i used to quite like it. yes preservative.

SmugColditz Mon 03-Nov-08 13:45:20

preservative, surely?

suzywong Mon 03-Nov-08 13:49:50

OK, but HOW does it function as a preservative? Is it a baceteria inhibiter? is it a dessicant? Is it so kids don't eat it?

SmugColditz Mon 03-Nov-08 15:35:46

I think it provides a hostile environment for the bacteria. (Like with bacon)

suzywong Mon 03-Nov-08 22:01:21

thank you smug colditz

WhizzzBangWhizzzOOOooAhhhh Mon 03-Nov-08 22:06:52

The salt draws out the moisture too & bacteria need moisture to grow - hence no bacteria

BoysAreLikeDogs Mon 03-Nov-08 22:07:48

Makes it taste horrible too

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