Basically Acidic Ink

This Basically Acidic Ink activity & project also includes:

If you don't want to drink red cabbage juice, here's another use for it—a decoder! Using vinegar and ammonia-based window cleaning liquids as invisible inks, scholars create designs in the second lesson of the series. Red cabbage juice becomes the key to uncovering the designs.

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Instructional Ideas

  • Have learners write secret messages to each other in invisible ink
Classroom Considerations

  • A variety of liquids is necessary, such as red cabbage juice; see materials section for complete list
  • Be sure to check district policy before showing video clips of movies

  • Provides a list of investigating questions to use with pupils during discussion and activity
  • Activity is fun and engaging

  • None