Security document with a securing element, a method for producing thereof, and a securing element

A laminated security document with a securing element located locally or on the whole surface of the security document, at least one coating layer being deposited onto the securing element, the securing element comprising a marking region composed of at least one printing ink layer containing optically variable interference pigments and fluorescent pigments and/or dyes and free of additives changing the absorption spectrum of the printing ink layer, the marking region comprising at least one laser marking applied by laser radiation, the laser marking being visually recognizable basing on an irreversible change of interference properties of the printing ink layer containing optically variable interference pigments and fluorescent pigments and/or dyes, and on a transformation, within the laser marking, of an original color demonstrating a change dependent on the observation angle into another color demonstrating no change dependent on the observation angle, wherein the laser marking is recognizable basing on a change of the intensity of light emission from the fluorescent pigments and/or dyes when illuminating the laser marking with the ultraviolet light.

A security document with a securing element located locally or on the whole surface of a non-laminated substrate, comprising a marking region composed of at least one printing ink layer containing optically variable interference pigments and fluorescent pigments and/or dyes and free of additives changing the absorption spectrum of the printing ink layer, the marking region having no other coating layers, and the marking region comprising at least one laser marking applied by laser radiation, that is visually recognizable basing on an irreversible change of interference properties of the printing ink layer containing optically variable interference pigments and fluorescent pigments and/or dyes, and on a transformation, within the laser marking, of an original color demonstrating a change dependent on the observation angle into another color demonstrating no change dependent on the observation angle, wherein the laser marking is recognizable basing on a change of the intensity of light emission from the fluorescent pigments and/or dyes when illuminating the laser marking with the ultraviolet light.

A security document with a securing element located locally or on the whole surface of a non-laminated substrate, covering a marking region composed of at least one printing ink layer containing optically variable interference pigments and free of additives changing the absorption spectrum of the printing ink layer, the marking region having no other coating layers, and the marking region comprising a laser marking applied by laser radiation, that is visually recognizable basing on an irreversible change of interference properties of the printing ink layer containing optically variable interference pigments, and on a transformation, within the laser marking, of an original color demonstrating a change dependent on the observation angle into another color demonstrating no change dependent on the observation angle, wherein for the laser marking the laser radiation is used of a wavelength in the range from 150 to 380 nm, preferably of a wavelength of 355 nm.

A laminated security document with a securing element located locally or on the whole surface of the security document, at least one coating layer being deposited onto the securing element, the securing element covering a marking region composed of at least one printing ink layer containing optically variable interference pigments and free of additives changing the absorption spectrum of the printing ink layer, the marking region comprising a laser marking applied by laser radiation, the laser marking being visually recognizable basing on an irreversible change of interference properties of the printing ink layer containing optically variable interference pigments, and on a transformation, within the laser marking, of an original color demonstrating a change dependent on the observation angle into another color demonstrating no change dependent on the observation angle, wherein for the laser marking the laser radiation is used of a wavelength in the range from 300 to 380 nm, preferably of a wavelength of 355 nm.

A method for producing of a security document with a securing element comprising steps of:

• a) applying onto a non-laminated substrate, locally or entirely, a marking region composed of at least one printing ink layer containing optically variable interference pigments and fluorescent pigments and/or dyes and free of additives changing the absorption spectrum of the printing ink layer, the marking region having no other coating layers;
• and
• b) marking the marking region by irradiating it with laser radiation and destroying the color changing effect of the at least one laser marking by irreversibly changing the interference properties of the printing ink layer containing optically variable interference pigments and fluorescent pigments and/or dyes, located within the laser marking, and by transforming, within the laser marking, an original color demonstrating a change dependent on the observation angle into another color demonstrating no change dependent on the observation angle, wherein, while irradiating the laser marking with a laser beam, the intensity of the light emission from the fluorescent pigments and/or dyes is changed, that is recognizable when illuminating the laser marking with the ultraviolet light.

A method for producing a security document with a securing element, comprising steps of:

• a) applying onto a non-laminated substrate, locally or entirely, a marking region composed of at least one printing ink layer containing optically variable interference pigments and free of additives changing the absorption spectrum of the printing ink layer, the marking region having no other coating layers;
• and
• b) marking the marking region by irradiating it with the laser radiation of a wavelength in the range from 150 to 380 nm and destroying the color changing effect of the at least one laser marking by irreversibly changing the interference properties of the printing ink layer containing optically variable interference pigments, located within the laser marking, and by transforming, within the laser marking, an original color demonstrating a change dependent on the observation angle into another color demonstrating no change dependent on the observation angle, wherein for the laser marking the laser radiation is used of a wavelength of 355 nm.