Adult Supervision Required
1 cup water and vinegar
-OR- 1 cup water and ammonia
For Revealing Spray
1. Dip a cotton swab into the ink and use it to write the secret message on a piece of paper.
2. Allow the message to dry completely.
3. To read the invisible ink, spray the message with the red cabbage water solution.
To make the revealing solution:
1. Chop the large red cabbage into small pieces.
2. Simmer the cabbage pieces in hot water until it turns into a deep shade of purple.
3. Allow the water to cool, and refrigerate it when not in use.
Be careful with the red cabbage solution, because it can stain your clothes!