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'Magic' writing experiment

Description

Messages or pictures are drawn on absorbent paper using a variety of colourless, dilute, aqueous solutions. These are invisible once dried but on spraying with suitable reagents the messages or pictures can be colourfully revealed.

Credits

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This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
magic-writing-experiment

Messages or pictures are drawn on absorbent paper using a variety of colourless, dilute, aqueous solutions. These are invisible once dried but on spraying with suitable reagents the messages or pictures can be colourfully revealed.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology .