![]() Invisible ink formula 2: This method involves creating the “ink” by mixing baking soda and water. There will be a difference in the way the wax will look over the lemon juice, enough to reveal the secret message. Reveal method 2: Lightly scribble over message with wax crayon. You can do this by holding the paper up to a lamp, applying hot air from a blow dryer, or even running an iron over it. Once dry the message will become invisible and any secret agent / spy worth his salt will know how to reveal it. Invisible ink formula 1: The simplest way to create invisible ink is to use lemon juice and Q-tips to write a message on a piece of paper.
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