Diy Invisible Ink Uv. Get a highlighter, pliers, hot water, empty cup, a uv/ black light, and a water tight jar. Squeeze both halves of your lemon over the bowl.
![Magic Purple 2 In 1 UV Black Light Combo Creative](https://i.pinimg.com/originals/83/1e/9c/831e9cb5d290aad41372cdbda07dcea6.jpg)
Don't destroy the highlighter trying to get it open. You can use lemon juice, milk, baking soda, cornstarch and iodine, and a white crayon. Invisible ink with lemon juice making invisible ink is a lot of fun, you can pretend you are a secret agent as you keep all your secret codes and messages hidden from others.
To make an invisible ink message that will be revealed by heat, first pour 1 teaspoon (5 ml) of lemon juice into a small bowl.
I’m putting that to the test. Using invisible ink is a cool way to hide your messages until its time for them to be read. Set the iodine aside for later. Painting the tonic water on paper under a uv blacklight and testing with a uv flashlight occasionally.