G&D | Special-effect inks for banknotes



Special-effect Inks

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Banknote Printing Team

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Intriguing security elements

G&D | Special-effect inks for banknotes

Printing using optically variable special-effect inks produces intriguing security elements that are quickly and easily identifiable and create irreproducible effects. The special-effect inks change their appearance depending on the angle from which they are viewed: they are visible or invisible, or they change color. In order to reproduce individual customer designs on banknotes and security documents, G&D offers various printing processes using special-effect ink. In this complex manufacturing step, we only use inks that are not commercially available. This puts yet another obstacle in the way of counterfeiters.

G&D offers a range of sophisticated designs, all of which are screen printed: from iridescent to optically variable colors. Because all effects can be printed on the banknote in perfect register both horizontally and vertically, they can be ideally integrated into any design. Special-effect inks are available in various colors and can be applied to the banknote as a localized patch, as stripes, or as a combination of the two.

Additional covert effects that are only visible using special readers help to increase security further.

Video

MAGnite


Hands-on security

G&D | Special-effect inks for banknotes

MAGnite is an interactive security feature for banknotes based on verification that is actively triggered by the user with unusual optical effects. The feature uses high-performance pigments that allow reversible changes between two color states.

Highly resistant micro capsules enclose these pigments, without in any way limiting their flexibility. The alignment of the pigments and the colors perceived can be controlled externally simply with magnetic effects.

G&D | Special-effect inks for banknotes

G&D | Special-effect inks for banknotes


This produces dynamic and contrasting effects, induced with magnets that are commonly available. Any individual can verify the authenticity of banknotes, for instance using the speaker magnets in their cell phone. There are therefore article surveillance systems available at the point-of-sale, among other things.

Video

MAGnite


Designs that appear or disappear

G&D | Special-effect inks for banknotes

Iridescent print effects are based on special luminescent inks that change color when the banknote is tilted so that the printed image becomes visible or invisible. The visibility or invisibility of the printed image depends on the incident angle of the light falling on the banknote. Iridescent effects are optically variable and therefore difficult to copy. These characteristics make them popular for increasing the level of security in existing banknote designs.

G&D’s iridescent effects represent a versatile security element that is suitable for more in-depth authentication of a banknote, without any need for a specific reader.

The iridescence owes its striking effect to tiny shimmering plates made from mica, which are mixed with a transparent varnish. When this varnish is applied to a substrate in the screen printing process, these tiny plates line up and can be seen as an iridescent effect.

G&D’s iridescent effects are available in a broad color spectrum. As they can be printed onto the note design horizontally and vertically in register, they can be perfectly integrated into an existing print design. They are available as a patch, stripe, or a combination of the two. If the iridescent special-effect ink also contains additional UV pigments so that it appears different in daylight and UV lights, this represents yet another obstacle to the counterfeiter.


Security through unique color-shifting

STEP (Shimmery Twin Effect Protection) is an optically variable ink based on liquid crystal pigments. When viewed from different angles, elements printed with this ink appear to change color (the “color-shift effect”, e.g. from green to blue).

G&D | Special-effect inks for banknotes

G&D | Special-effect inks for banknotes


Security at your fingerprints

FEEL (Fast Energy Effective Link) is an interactive security feature for banknotes. The warmth of your fingertip is enough to alter the color at a specific location on the banknote. This makes it very easy to authenticate.

The secret is thermochromism, the special ability of materials to change color depending on the ambient temperature. G&D has perfected this basic thermochromic principle for use in security printing and applies it in banknotes as a security feature that is very difficult to imitate.

FEEL undergoes a clearly visible color change as soon as it is exposed to heat. Depending on the design, multiple layers of motifs and information printed over each other may become visible. The heat generated by the skin or by lightly rubbing with the fingertip is sufficient to verify authenticity.

G&D | Special-effect inks for banknotes
FEEL in its normal state

G&D | Special-effect inks for banknotes
FEEL in action