Lemon Juice Invisibility

Simon gave me another heads up on a way to hide image/text… Lemon Juice.

Then when looking at science for kids, trying to find emulsion paper, I saw the Lemon Juice invisibility. It gives you simpe instructions on how to do it but basically you just use lemon juice to create your text/image, which you obviously will not be able to see, until you hold a light to it, which heats it up and then you can view what you created in the lemon juice.


Some websites are suggesting that it is quite hard to reveal the message and you have to heat the paper up alot. I am not sure how I will really be able to do this is the page is attached to the book and obviously I do not want it to be dangerous.

Other products you can use for invisibility:

  • baking soda
  • corn starch
  • milk

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