With Valentine’s Day just around the corner, I thought it was a perfect time to share with you a kitchen science activity you can use to send secret messages to your loved one!
This is one of our kids' favorite things to do - there’s nothing like getting a blank piece of paper and making a secret message appear!
To make your secret message you will need the following:
Here is how you make your secret message
After the paper has been heated up, the message on the paper will turn brown, making it possible to read.
The acid in the lemon juice breaks down the paper a bit, thus weakening it. The weakened paper burns before the rest of the paper, which is why you must remove it from the heat source just after the message appears or the entire paper will burn.
You can try the experiment again using water, which is neutral. It should not degrade the paper the way the lemon juice does, so the message won’t appear. You can also try writing messages with vinegar, orange juice or white wine, which will degrade the paper the same way the lemon juice did.
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