In a printed article, pigment flakes are magnetically aligned so as to form curved patterns in a plurality of cross-sections normal a continuous imaginary line, wherein radii of the curved patterns increase along the imaginary line from the first point to the second point. When light is incident upon the aligned pigment flakes from a light source, light reflected from the aligned pattern forms a bright image which appears to gradually change its shape and move from one side of the continuous imaginary line to another side of the continuous imaginary line when the substrate is tilted with respect to the light source.

An oil-based inkjet ink can be provided that prevents adhesion of the ink to the nozzle plate, thereby preventing ink misfires and discharge defects from the inkjet nozzles. The oil-based inkjet ink contains a pigment, a non-aqueous solvent, and a compound represented by general formula (1) shown below. ##STR00001##
(In general formula (1), m represents 1 or 2, each of R.sup.1 and R.sup.2 independently represents a monovalent saturated hydrocarbon group, R.sup.3 represents a single bond or a divalent saturated hydrocarbon group, and R.sup.4 represents a monovalent or divalent saturated hydrocarbon group.)

A radiation curable ink composition that includes (A) a mono-ethylenically unsaturated oligomer, (B) a mono-ethylenically unsaturated monomer, and (C) an acrylate ester of a carboxylic acid ester and which is substantially free of a photoinitiator. A printed article including the radiation curable ink composition in cured form, and a method of forming an image with the radiation curable ink composition are also provided.

In one aspect, inks for use with a three-dimensional printing system are described herein. In some embodiments, an ink described herein comprises a thiol monomer component and an ene monomer component. Moreover, in some cases, an ink described herein further comprises an additional (meth)acrylate monomer component differing from the ene monomer component. In some such cases, the additional (meth)acrylate monomer component can be polymerized separately from the thiol and ene monomers of the ink.

In one aspect, inks for use with a three-dimensional printing system are described herein. In some embodiments, an ink described herein comprises a thiol monomer component and an ene monomer component. Moreover, in some cases, an ink described herein further comprises an additional (meth)acrylate monomer component differing from the ene monomer component. In some such cases, the additional (meth)acrylate monomer component can be polymerized separately from the thiol and ene monomers of the ink.

The present invention relates to a medical wristband with invisible information and a method for manufacturing the same. The conventional developed dyes or inks in the prior art can store information which, however, is visible. In the present invention, polystyrene (PS) microspheres are prepared by micro-emulsification: PS particles are dissolved in a toluene solution and a fluorescent dye is added to obtain a fluorescent solution; an SDS solution is added in and mixed with the fluorescent solution to obtain a system to be ultrasonically emulsified; and the system is ultrasonically emulsified and the toluene is completely volatilized. The ink can be used directly as an invisible ink. The information is written, as two-dimensional codes and by the ink, on a piece of non-fluorescent paper, and plastic-packaged onto a wristband of a patient. Information about a patient can be successfully scanned in the ease of UV on.

There is provided a compound which provides a semiconductor material. The compound is represented by General Formula (1) ##STR00001## wherein Ar represents an aryl group which may have a substituent or a heteroaryl group which may have a substituent, and R.sup.1 represents an acyclic alkyl group having 1 to 20 carbon atoms wherein hydrogen atom in the alkyl group may be replaced by a halogeno group, a nitrile group or an aryl group, and —CH.sub.2— in the alkyl group may be replaced by —O—, —R′C═CR′—, —CO—, —OCO—, —COO—, —S—, —SO.sub.2—, —SO—, —NH—, —NR′— or —C≡C— provided that, with respect to each of an oxygen atom, a sulfur atom and a nitrogen atom, the same atoms are not directly bonded to each other, wherein R′ represents an acyclic or cyclic alkyl group having 1 to 20 carbon atoms.

There is provided a compound which provides a semiconductor material. The compound is represented by General Formula (1) ##STR00001## wherein Ar represents an aryl group which may have a substituent or a heteroaryl group which may have a substituent, and R.sup.1 represents an acyclic alkyl group having 1 to 20 carbon atoms wherein hydrogen atom in the alkyl group may be replaced by a halogeno group, a nitrile group or an aryl group, and —CH.sub.2— in the alkyl group may be replaced by —O—, —R′C═CR′—, —CO—, —OCO—, —COO—, —S—, —SO.sub.2—, —SO—, —NH—, —NR′— or —C≡C— provided that, with respect to each of an oxygen atom, a sulfur atom and a nitrogen atom, the same atoms are not directly bonded to each other, wherein R′ represents an acyclic or cyclic alkyl group having 1 to 20 carbon atoms.

Provided are an inkjet textile printing method including a step of performing direct printing on a textile by an inkjet method with an inkjet ink including an aqueous dispersion of a dye polymer having a structure derived from a dye having a xanthene skeleton; a coloring composition and an inkjet ink including the aqueous dispersion of the dye polymer; an ink cartridge including the inkjet ink filling the ink cartridge; and the dye polymer.

The present invention provides photoluminescent iron-doped barium stannate materials absorbing ultraviolet (UV) light and exhibiting strong near-infrared (NIR) luminescence. Such materials exhibit increased integrated photoluminescence intensity in comparison to known BaSnO.sub.3 and iron-doped barium stannate materials, and therefore they are particularly useful for the production of photoluminescent security ink compositions and transparent covert security features with improved anti-counterfeiting resistance that can be used for protection of documents and articles against counterfeit and illegal reproduction.