How To: Make invisible ink with milk and an iron

Make invisible ink with milk and an iron

How to Make invisible ink with milk and an iron

Create a secret message for your friends without anyone knowing what you're up to! You can make some easy invisible ink using just some milk. Write your message in milk-ink using a Q-tip. Then let it dry for at least half an hour. The paper will look normal - only an iron will reveal your writing.

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