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MAGNETIC STRIPE
The magnetic stripe is
a ribbon on which a series of digital data can be stored
for subsequent reading. The stripe is generally applied
to the reverse side of the card and in compliance with
the applicable ISO standards.
One of the main
characteristics of mag-stripes is their capacity to
resist data loss caused by the proximity of external
magnetic fields. This characteristic is referred to as
coercivity (He) or density.
The magnetic stripe
can be: LoCo - Low Coercivity, typically 300 oersted, or
HiCo - High Coercivity, typically 4000 oersted.
The former type can
usually be recognized by cursory inspection because of
their brown colour; these stripes are generally used for
cash point cards. The second type, black in colour, are
used for access control cards or identification badges.
Moreover, the stripe is divided into three different
tracks, each having a specific data storage capacity:
ISO track 1 - 79
alphanumeric characters - (high zone)
ISO track 2-40
numerical characters - (mid zone)
ISO track 3-107
numerical characters - (low zone)
In addition to the
"traditional" colours indicated above, the stripe can
also be supplied in alternative colours (red, green,
blue, etc.): this option makes it possible to combine
the functional requirements of the card with purely
aesthetic effects. There are also so called "disposable"
cards on which the magnetic stripe is applied by screen
printing with magnetic ink.
Tips
• The durability of
the mag-stripe depends on the technique utilized to
apply it to the card. The most reliable
results are obtained
with the "flush-on" technique: with this technique the
stripe is integrated with the plastic sheet that is
bonded to the card by means of a lamination process. The
other technique in use is called "roll-on" and consists
in applying the stripe after the lamination process.
Applications
• Identification
badges, access control, loyalty cards, bank cards,
subscription cards...
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