Hide Your PIN or Password on a Fake Business Card With Magic Ink
Keeping a note that helps you remember your PIN, password, or lock combination can be risky, especially if caught by thieves. This handmade fake business card will only reveal your secret note if you heat it up a little.
In this YouTube video from Shake the Future, you’ll learn how to hide any message on a fake business card (like a PIN that’s easy to forget) with thermochromatic pigment and nail polish. Create and print a fake business card on thick paper using a text editor or free online template (a quick Google search will help). Then create and print an additional logo to match the card (with your note inside). Mix thermochromatic pigment with gel-effect nail polish and paint over an additional logo and note. Then, cut out the logo you just drew and attach it to your business card with glue.
If you press with your thumb on the new logo, you will see the pigment disappear and a hidden message will appear. Now, whenever you forget your PIN, lock combination, password, or anything else that is difficult for you to remember, you know where to look. And if your wallet or wallet gets stolen, thieves can never find it.
Secret PIN-code | Youtube