How to Make Invisible Ink
Write a secret message with invisible ink using these simple household items.
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You Will Need
- Lemon juice
- A bowl
- A cotton swab
- White paper
- A light source with a 100-watt light bulb
- Milk (optional)
- Vinegar (optional)
- Orange juice (optional)
- Paintbrush (optional)
- Toothpick (optional)
Steps
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Step 1
Put lemon juice in bowl
Put the lemon juice in a bowl and dip your cotton swab in the lemon juice.
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Using milk, vinegar, or orange juice instead of lemon juice will have the same effect.
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Step 2
Write your message
Write your secret message on the paper with your cotton swab and let the writing dry completely. The message will be invisible when the message dries.
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You can use a paintbrush or a toothpick instead of a cotton swab.
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Step 3
Heat the paper
Hold the paper near the light bulb to expose it to the heat, but don’t rest the paper on the bulb.
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Step 4
Message appears
Watch in amazement as the message magically appears. The words will appear in a tan or brown color.
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Did you know? Arizona and California produce 95 percent of the U.S. lemon crop.
