Credit Cards Reveal Hidden Symbols Under Black Lights

August 12, 2011 at 2:00 am 4 comments

By Chad Upton | Editor

Many people know that paper money has markings that illuminate under a black light. These markings make it more difficult to counterfeit and thus easier to spot counterfeit money. Also, regular paper glows wildly under a black light, while currency paper does not, another dead giveaway. The same also applies to credit cards.

For this demonstration, I rounded up one card from each of the major issuers and tore my basement apart looking for my standard issue college black light. I eventually found it, but only after creating a small pile of retro items for this year’s halloween costume.

The black light’s strong purple glow catalyzed the American Express card to reveal “AMEX” spelled across the card, with a picture of a globe between “AM” and “EX.”

MasterCard was hiding “MC” on theirs:

The Visa card revealed the V logo.

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Entry filed under: Demystified, Money. Tags: , , , , , , , , , .

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4 Comments Add your own

  • 1. Bekah  |  August 15, 2011 at 11:35 am

    I’m going to have to try that out! I never knew that or would have even thought about it.
    And I had no idea that paper money would glow under a black light. Yet, another thing I must try!

  • […] Broken Secrets a realizat un experiment pentru a vedea însemnele ascunse pe cardurile bancare. Folosind un dispozitiv improvizat, au descoperit că fiecare producător de carduri foloseşte însemne diferite. […]

  • […] post originally appeared on Broken […]

  • 4. Ben  |  November 10, 2012 at 4:02 pm

    Your style is so unique in comparison to other people I’ve read stuff from. I appreciate you for posting when you’ve got
    the opportunity, Guess I will just book mark
    this site.



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