Invisible Ink
Interested in a bit of magic? You can write or draw a secret message to share with a family member or a friend that they can "reveal" after you share the secret formula (graphite + sandpaper). Watch the video to learn more.
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materials:
copier paper cotton swab pencil small piece of sandpaper a paper towel or tissue small cup whole milk or 2% milk (skim milk will not work) |
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HOW DOES IT WORK???
When your message dries on the paper, most of the milk evaporates but the fat stays on the paper. Graphite sticks to the fat more than the paper to unmask your message.
When your message dries on the paper, most of the milk evaporates but the fat stays on the paper. Graphite sticks to the fat more than the paper to unmask your message.
