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Topic: wet/dry indicators  (Read 3160 times)

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Offline darrin

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wet/dry indicators
« on: March 16, 2010, 02:51:08 PM »
I'm looking for something that will be colored while in a liquid state and clear when dry.  Does anyone know what is in Elmer's brand Spackle or glue stick that is pink when wet and dries white?
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Offline Mitsunobo

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Re: wet/dry indicators
« Reply #1 on: March 22, 2010, 04:32:48 PM »
An indicator similar to what you described would be blue vitriol or copper sulfate. It is blue when its wet and grey when its dry.
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