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Disappearing Ink - Chemical Demonstration Kit

Disappearing Ink - Chemical Demonstration Kit, AP8894
Catalog Number
Disappearing Ink - Chemical Demonstration Kit
Product Description

By: David Katz
Pima Community College, Tucson, AZ

It's magic! It's mystery! No—it's science! Teachers and students write secret messages with disappearing ink and then use chemistry to develop and transmit the messages. Students learn about the properties of a characteristic acid-base indicator and extend their understanding of pH and acid-base concepts. This newly updated demonstration is sure to engage your students' interest. It is also a perfect activity for open-house events in the science classroom-let your students prepare special mystery ink “cards” to greet parents and visitors. Students are eager to display their growing chemical knowledge when they develop the secret messages and explain the chemical basis of the disappearing ink phenomenon to curious visitors. Teacher Demonstration Notes included. Enough materials are included to perform the demonstration seven times.
Concepts: Acids and bases, pH, indicators
Time Required: 20-30 minutes
Chemicals Provided: Thymolphthalein indicator solution and sodium hydroxide solution


  • Disappearing Ink Video
    Disappearing Ink Video
    It’s magic, it’s mystery—no, it’s science! Write secret messages with the disappearing ink indicator and use chemistry to develop the messages.
Additional Resources
Flinn Catalog/Reference Manual Page 344
Flinn Middle School Catalog/Reference Manual Page 398
P.O. Box 219, Batavia, IL60510



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