The present invention relates to the field of security inks suitable for printing machine readable security features on substrate, security documents or articles as well as machine readable security feature made from said security inks, and security documents comprising a machine readable security feature made from said security inks. In particular, the invention provides security inks comprising one or more IR absorbing materials selected from the group consisting of crystal water-free iron(II) orthophosphates of the general formula Fe.sub.3(PO.sub.4).sub.2 and having a graftonite crystal structure, crystal water-free iron(II) metal orthophosphates, crystal water-free iron(II) metal phosphonates, crystal water-free iron(II) metal pyrophosphates, crystal water-free iron(II) metal metaphosphates of the general formula Fe.sub.aMet.sub.b(PO.sub.c).sub.d, wherein said security ink is an oxidative drying security ink, a UV-Vis curable security ink, a UV-Vis curable security ink or a combination thereof.

The present invention relates to the field of security inks suitable for printing machine readable security features on substrate, security documents or articles as well as machine readable security feature made from said security inks, and security documents comprising a machine readable security feature made from said security inks. In particular, the invention provides security inks comprising one or more IR absorbing materials selected from the group consisting of crystal water-free iron(II) orthophosphates of the general formula Fe.sub.3(PO.sub.4).sub.2 and having a graftonite crystal structure, crystal water-free iron(II) metal orthophosphates, crystal water-free iron(II) metal phosphonates, crystal water-free iron(II) metal pyrophosphates, crystal water-free iron(II) metal metaphosphates of the general formula Fe.sub.aMet.sub.b(PO.sub.c).sub.d, wherein said security ink is an oxidative drying security ink, a UV-Vis curable security ink, a UV-Vis curable security ink or a combination thereof.

An active-energy-ray-curable composition including at least one monofunctional (meth)acrylate, at least one multifunctional (meth)acrylate, and at least one chlorinated-olefin-structure-containing polymer.

An active-energy-ray-curable composition including at least one monofunctional (meth)acrylate, at least one multifunctional (meth)acrylate, and at least one chlorinated-olefin-structure-containing polymer.

An adhesive sign suited to use in retail applications includes a substrate layer. An adhesive layer is disposed on the substrate layer. The adhesive layer defines an exposed region for attachment to an associated structure. The adhesive layer is derived from a photo-curable inkjet composition. An ink layer is disposed on the substrate layer. The ink layer includes an image. The ink layer is derived from a photo-curable inkjet composition. The adhesive layer and ink layer can be formed in the same inkjet printing process and cured in a common photo-curing station. A stack of the adhesive signs can be assembled without interleaving a release liner between each pair of signs.

An adhesive sign suited to use in retail applications includes a substrate layer. An adhesive layer is disposed on the substrate layer. The adhesive layer defines an exposed region for attachment to an associated structure. The adhesive layer is derived from a photo-curable inkjet composition. An ink layer is disposed on the substrate layer. The ink layer includes an image. The ink layer is derived from a photo-curable inkjet composition. The adhesive layer and ink layer can be formed in the same inkjet printing process and cured in a common photo-curing station. A stack of the adhesive signs can be assembled without interleaving a release liner between each pair of signs.

A color converter may include a polymeric matrix material and at least one organic fluorescent colorant of formula I.a, I.b, and/or I.c

##STR00001##

wherein R.sup.1, R.sup.2, R.sup.3, R.sup.5, R.sup.6, R.sup.7 are H, C.sub.1-C.sub.20-alkyl or C.sub.6-C.sub.14-aryl-C.sub.1-C.sub.10-alkylene; R.sup.4a, R.sup.4b are fluorine, chlorine, cyano or OR.sup.10, R.sup.8a, R.sup.8b are C.sub.1-C.sub.20-alkyl; R.sup.8c is C.sub.1-C.sub.20-alkyl, C.sub.6-C.sub.10-aryl or C.sub.6-C.sub.10-aryl-C.sub.1-C.sub.10-alkylene, wherein the aryl moieties being optionally substituted by k substituents R.sup.9; k is 1, 2, 3, 4, 5 or 6; R.sup.9 is C.sub.1-C.sub.10-alkyl, C.sub.1-C.sub.10-alkoxy, CN, halogen, phenyl or phenoxy; and R.sup.10 is C.sub.1-C.sub.10-alkyl or hydroxy-C.sub.1-C.sub.10-alkyl. Backlight units for liquid crystal displays; liquid crystal display devices, and a self-emissive display devices may include this color converter and such colorant.

The present invention relates to the field of low energy radically curable inks for offset or letterpress printing of security documents. In particular, the invention relates to low energy radically curable offset or letterpress printing inks for offset or letterpress printing on a substrate or security document, said low energy radically curable inks having a viscosity in the range of about 2.5 to about 25 Pa s at 40° C. and 1000 s.sup.−1 and comprising radically curable (meth)acrylate compounds, one or more one or more photoinitiators of formula (I), one or machine readable materials and one or more fillers and/or extenders. ##STR00001##

The present invention relates to the field of low energy radically curable inks for offset or letterpress printing of security documents. In particular, the invention relates to low energy radically curable offset or letterpress printing inks for offset or letterpress printing on a substrate or security document, said low energy radically curable inks having a viscosity in the range of about 2.5 to about 25 Pa s at 40° C. and 1000 s.sup.−1 and comprising radically curable (meth)acrylate compounds, one or more one or more photoinitiators of formula (I), one or machine readable materials and one or more fillers and/or extenders. ##STR00001##

A dispersion contains, as essential ingredients, light-emitting nanocrystals, a polymeric dispersant having an amine value of 5 mg/KOH g or more, and a stimulation-responsive curable material that cures in response to an external stimulus.