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How to Make Invisible Ink

www.flickr.com
Flickr Photos (Photos tagged with the keyword): b3okinvisibleink


Materials Needed 2 tablespoons of pure lemon juice

cotton swabs

Instructions Pour the lemon juice into a small dish. Soak the end of a cotton swab in the lemon juice and use it to write a secret message or a top secret picture. When you want to read or see your secret creation, hold the paper near a lightbulb, burner, or toaster. The heat will turn the invisible writing brown and you can see it!
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QRCodes, globokodes, Game Pieces & Clues ~(Flickr keyword tag): qrinvisibleink

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