Secret Messages With Invisible Ink

Have you ever wanted to send your friend a secret message that no-one else can read? How about invisible ink, a special type of ink that you can use for writing and that does not show up on paper. Only after a special treatment will it appear again magically, and the message can be read. How does this work? Find out in this activity and write your own secret messages!

Materials

Cardstock

Measuring spoons

3 cups or small bowls

Spoon

Q-tips or a brush

Old newspaper or cardboard

Paper Towels

Method 1

Water

Lemon or lemon juice

Iron

Method 2

Baking soda

Water

Turmeric and rubbing alcohol OR concen...