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Cards with magnetic strip

  • 08-11-2006 9:11pm
    #1
    Voodu Child
    Closed Accounts Posts: 6,706 ✭✭✭


    Whats the simplest way of erasing the magnetic strip in a card (ie credit card, ID card, etc.)?

    I saw some thing on mythbusters about it, but cant remember the details. Im thinking a strong magnetic field..but from what? Any ideas?


Comments

  • #2
    Crucifix
    Registered Users, Registered Users 2 Posts: 3,437 ✭✭✭Crucifix


    In terms of household objects, I reckon a good speaker system would have the best magnet, but I don't know if that'd be enough.


  • #3
    Mr. Presentable
    Closed Accounts Posts: 9,495 ✭✭✭Mr. Presentable


    any card issued by a bank will be hi co and very hard to erase. If it's an id card though a strong magnet may do it


  • #4
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 94,288 Mod ✭✭✭✭Capt'n Midnight


    If it's Chromium Dioxide you could heat it to a bit beyond boiling point of water cf. curie temperature. But most curie temps are beyond m.p. of plastic

    a tape head degausser ?

    hold in the corner of a BIG monitor and when you turn it on the WUMP of the degaussing coil may have some effect.

    you could convert a transformer into an electromagnet - but large risk of electrocution so not a good idea


  • #5
    Delphi91
    Registered Users, Registered Users 2 Posts: 1,501 ✭✭✭Delphi91


    Someone once told me that having a neodymium magnet in his pocket screwed up his bank cards.

    Those are seriously strong.


  • #6
    Civilian_Target
    Registered Users, Registered Users 2 Posts: 5,618 ✭✭✭Civilian_Target


    Yeah - you're gonna need one hell of a magned to screw with a magnetic strip in a card. Best way to destroy it is to just pass it over a hot surface - ie. the plates of your cooker.


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  • #7
    bonkey
    Registered Users, Registered Users 2 Posts: 15,443 ✭✭✭✭bonkey


    voodoo_child wrote:
    Whats the simplest way of erasing the magnetic strip in a card (ie credit card, ID card, etc.)?

    Melt it.

    If you mean the simplest non-destructive way of erasing the magnetic strip, then its a different story.


  • #8
    bonkey
    Registered Users, Registered Users 2 Posts: 15,443 ✭✭✭✭bonkey


    Civilian_Target wrote:
    Yeah - you're gonna need one hell of a magned to screw with a magnetic strip in a card.

    Really?

    I recall that when I worked in a bank, it was not uncommon for cards to get erased because people stored their cards "strip to strip" and the magneticism of each interfered with the other.

    Wasn't total erasure....just enough to make it unusable.


  • #9
    cunnins4
    Closed Accounts Posts: 882 ✭✭✭cunnins4


    I work in a department store in town, and the gift cards we sell are easily destroyed and made unreadable by passing them over the magnets used to remove security tags. they're quite strong, but not uncommon. The magnet in a speaker as stated above would be of similar strength.

    dunno about credit/atm cards, they might be more durable though.


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