Time Expiring Badges Explained
Before
Most expring badge processes work in the same manner. There is a two-
part tag that is applied to the badge. (The back may already be built
into the badge, or the entire badge may be an expiring tag.) A
protective film is removed from the front part of
the tag, and it is applied to the back. There is a chemical reaction
between the two parts, and the ink in the back migrates up through the
adhesive. This ink becomes visible through the transparent front part
holding any overprinting.
The speed of this migration can be adjusted by using different components
in the adhesive. Badges can be set to expire in as little as two
hours or as long as a month.
After
In this example, the "V" is overprinted on the clear, front layer.
The diagonal red lines are printed in a special ink on the back layer.
An opaque layer of adhesive is between the two. Over time, the ink
will move up through the adhesive until it shows behind the clear
layer. It is nearly impossible to remove the
adhesive from behind the front layer, and trying to do so results in
noticable damage to the expiring tag.
While no security solution
is foolproof, expiring badges offer an easy and secure way to manage
access to your business.
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