Make This Crazy Cool Invisible Ink Marker Using Just 3 Ingredients

Most likely how the Founding Fathers did it in National Treasure's version of history.

Emily Shwake / BuzzFeed / Nifty

No need to be romantically involved with Nick Cage to write and decipher secret messages.

Disney

God, that's terrifying. Nope, just drain a highlighter of its ink!

See how to make invisible ink pens here.

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Learn more about how it works on the Center for Sustainable Nanotechnology blog.

Supplies

Yellow highlighter

Hot water

Black light, $7

Instructions

# Take apart the highlighter, removing the ink tube.

# Heat up water in the microwave for about a minute.

# Let the ink tube soak in the water for two minutes and squeeze out the ink.

# Repeat until the tube is clear.

# Soak the highlighter tip in clean warm water for about 30 seconds or until it is clear of ink.

# Put the highlighter back together.

# Use the marker to draw and write, and place it under a blacklight to reveal the ink.

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