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Normally security
features are
incorporated into
the paper while it
is being
manufactured, making
them part of the
substrate itself.
These features are
thus extremely
difficult to
counterfeit or alter
without degrading
the paper itself.
For maximum
effectiveness,
different types of
features are used in
various
combinations, to
make the document
secure on more than
one level. These
range from the most
obvious, (overt)
like the watermark,
through features
which need special
equipment such as a
UV lamp to
authenticate them
(covert), to the
most discreet, known
only to a very few
people (forensic).
Security features
that complement a
watermark include:
Security threads.
Threads include
Cleartext (issuing
authority legend can
be read in
transmitted light);
Thermotext (thread
coated with
thermochromic
pigment that changes
colour when heated,
for example by
rubbing with a
finger); holographic
thread; and
machine-readable
thread.
Chemical
sensitising.
Hidden or
encapsulated
dyestuffs that
produce vivid
voiding stains on
the application of a
broad range of
chemicals commonly
used to tamper with
documents.
Embedded security
fibres.
Synthetic fibres
dispersed throughout
the paper during
manufacture. They
are available in a
range of colours
that are visible in
normal light and
fluoresce under UV
light. We recommend
a selected mix of
fibres.
Electron-Beam
Holography
In partnership with
a UK company that is
the leader in
security
microstructure
technology, we are
able to offer all
our clients the
choice of either
classical 3-D laser
holograms or an
Electron Beam
generated hologram.
Electron beam
holography can
provide a refined
and superior
holographic security
features to counter
the threat of
counterfeiting and
also simplify the
identification of
original documents.
Some standard
features of electron
beam holography are:
§
Dynamic and
multi-channel visual
effects
§
Special optical
elements
§
Low-light
recognition visual
features
§
Advanced covert
laser viewable
images
§
Complex nanographics
at 500,000 dpi
§
Fingerprint topology
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