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Protection against Forgery |
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Polygraphic protection facilities Forgery protection – a key goal during manufacture of ID document sheets and plastic cards of all types
Flat offset printing The characteristic features of this printing type are even, but slightly fuzzy edges of the strokes. The printer’s ink is applied in a thin and rather even layer. Examination with magnifier shows, that the imprint, printed by flat offset type, has an extraneous pattern that is formed by regular dots, usually of yellow, purple, blue and black colours. In the case of a more complex process, usually used for printing registered high-security forms, the imprint can be dotted, that is executed by lines of different shapes and directions, which reiterate the colour and the order of the graphic design.
Screen printing This process, uses a printing plate in the form of fine cell meshes, where printing elements can leak printer’s ink through, while spacing elements cannot. The printer’s ink on the screen imprint is usually applied in a thick glazed layer. When examining thin strokes in the light, at a sharp visual angle, one can often notice flashes. The ink’s layer in the middle of the stroke is often thicker than in the edges. Strokes’ edges, especially round ones’, have a sawtooth shape.
Background graphic elements in a form of meshes and gullioche elements The imprint, formed by thin crossing lines of unsatured shades, used as an element of the cards’ appearance, as well as subsidiary image for creation the protection signs.
Microtext of various kinds Microtext can be treated as text or number lines with a height not more than 0,2 mm. Usually, this sign works as a protection against reproduction by reprographic ways .
«Hidden» graphic image These are imprints, printed by ink, which create relief images that can be observed at an appointed incline of the imprint depending on the visual angle and source of light.
Printed components, implemented with safety prints: Metallized · Iridescent · Visible · Invisible · Respondent to ultraviolet or infra-red irradiation. Rainbow printing This is a kind of flat offset printing, in which the imprint is rendered by transient from one to another color.
More effect patterns Those are regular patterns, created by the groups of thin parallel lines, with different angles’ and direction. Those patterns are usually executed in bright rich colors. Then examining them by the unaided eye from a distance of 30-40 cm the patterns are perceived as an even clean margin. During copying of this regular structure there appears a pattern (more) in a form of well distinctive dark and light free designs and geometric figures.
Holographic elements A Hologram is a high complex microstructure, which creates visual feeling of stereoscopic picture. Holographic information recording takes place during laser interference shooting. This technology allows us to develop holographic elements with an extremely bright and clear imprint. The colors and the variety of optical effects determine the attractiveness of the holograms. These can be incorporated and included in plastic cards.
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Polygraphic protection facilities |
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«Znak» Ltd. 64, Lenina Str. Kiev, Ukraine, 02088 tel.: +38 (044) 561-25-94 fax: +38 (044) 561-25-96
e-mail: znak@znak-idcard.com
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