DIY: How to Make an Invisible Ink

Do you remember any action movies, like a movie about Bill Gates who tried to find treasure maybe? One of the scene is Bill was reading codes on a map, and that’s written by using invisible ink. So you can write secret messages with ink that only appears when exposed to heat! How awesome is that? Super awesome for me!

You may need:

White Paper

Cotton swabs or paint brushes

Small container

Lemon juice

How to Make an Invisible Ink:

1. Pour some lemon juice into your container.
2. Dip your cotton swab or brush into the lemon juice and write your message on the paper.
3. Allow the juice to dry.
4. Hold your paper over a hot toaster or light bulb and watch the message appear.

Inspiration from Sheri Hosale