How to Make Invisible Ink for Writing Top-Secret Messages

Create your own top-secret notes with this simple technique using grape juice and baking soda.

For the chance to win a cool spy prize, click here to read the rest of our invisible ink message.

WHAT YOU’LL NEED TO MAKE INVISIBLE INK

• 1 tablespoon of baking soda
• ¼ cup of water
• Grape juice concentrate
• Paintbrush or cotton swab
• Paper
• Two small bowls

HOW TO WRITE A SECRET MESSAGE WITH INVISIBLE INK

1. Mix the baking soda and water in a small bowl. This is your invisible ink.

2. Dip a finger, cotton swab or paintbrush into the “ink.”

3. Write your message on a piece of light-colored paper.

4. Let it dry completely.

HOW TO REVEAL AND READ AN INVISIBLE INK MESSAGE

1. Lightly paint grape juice concentrate across the paper with a brush.

2. Your message will slowly appear as the juice saturates the paper.

WIN A SPY PRIZE

For the chance to win a cool spy prize, click here to read the rest of our invisible ink message.