How to make Invisible Ink

Invisible in is the ultimate way to send messages. If you write it in code it will make it even more confusing. To find out how to make more cool stuff, go to Instructables.

Invisible Ink 1: UV Light

Step 1: Get a Highlighter, Pliers, Hot Water, Empty Cup, a UV/ black light, and a Water tight Jar.

Step 2: Depending on what kind of highlighter you have you can usually open them up with pliers. Don't destroy the highlighter trying to get it open. Once you get it open take out the tube of ink that is inside, and pull the tip of it (the part you write with) out with pliers.

Step 3: put the tube and tip into a cup of water. Put it in the microwave until it starts boiling.

Step 4: Take out the tube with the pliers and squeeze all of the ink out into the cup. Do the same thing with the tip.

Step 5: Add enough water so that you can see through the water clearly but it is still dark. Put the tube and tip back into the cup and put it in the microwave until it boils again.

Step 6; Put them back into the highlighter and you have your invisible pen! To save the ink put it in a water tight jar so you can refill your pen. Your ink will show up under a UV light or black light.

Invisible ink 2: Lemon Juice

Step 1:  Get Lemons, Heating lamp, and Q-tips

Step 2: Squeeze the lemon juice into a bowl.

Step 3: Dip the Q-tip in the lemon juice once every 10 letters to write your secret message. Let it dry for 30 minutes.

Put the Heating lamp or whatever you have that is hot up to the paper to make the ink appear permanently. Make sure it doesn't catch on fire!