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Disappearing Ink – an Acid/Base indicator

Acid/Base indicators make cool things like disappearing ink possible. But, how do you get disappearing ink to fade as fast as possible? You saturate it with CO2 from a fire extinguisher…Dave Holmes from WTVG-13 had no idea what was coming.

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About the author

Carl Nelson is the Chief Scientist and Exhibits Director at Imagination Station in Toledo, Ohio. He has a Masters Degree in Experimental Physics from Michigan State University and over 18 years experience working in science centers.

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