PRINTING OF SECURITY FEATURES

To print a security feature on a medium a method is suggested, comprising inkjet printing an ink including one or more pigments, wherein at least one pigment satisfies the formulaπΔρ⁢⁢gd412⁢⁢kB⁢T>1and whereas Δρ is the density difference between pigment and ink vehicle; g is the earth acceleratio...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	MARTINI, Thibaut
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COLOUR PRINTING CORRECTING FLUIDS DYES FILLING PASTES INKS LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS TRANSPORTING TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	To print a security feature on a medium a method is suggested, comprising inkjet printing an ink including one or more pigments, wherein at least one pigment satisfies the formulaπΔρ⁢⁢gd412⁢⁢kB⁢T>1and whereas Δρ is the density difference between pigment and ink vehicle; g is the earth acceleration constant; d is the pigment particle diameter D90; kB is the Boltzmann constant; and T is the temperature. Inkjet printing of the ink is performed by a flextensional ink jet print head structure and printing is performed to provide one or more security features on the medium.