An object of the present invention is to provide a phycocyanin pigment composition insoluble in water and provide food, cosmetics, a coating material or a printing marker for pharmaceuticals or agricultural chemicals, a stationery product, a writing tool, a printing ink, an inkjet ink, a metal ink, a paint, a plastic coloring agent, a color toner, a fluorescent labeling agent, a fluorescent probe, or a chemical sensor, each containing the pigment composition. It was found that the phycocyanin pigment composition containing phycocyanin and a metal or a metal compound was insoluble in water, and thus the present invention was accomplished.

The card comprises a first translucent or transparent substrate layer, preferably in PVC, and a second substrate layer, and a cracked layer of ink between the two substrate layers so as to allow the second substrate layer to show through the cracks of the layer of ink. The cracked layer of printing ink comprises mirror-effect ink, that reflects light through the first translucent or transparent substrate layer. The cracking of the layer of ink is achieved when the card is manufactured by laminating it.

The card comprises a first translucent or transparent substrate layer, preferably in PVC, and a second substrate layer, and a cracked layer of ink between the two substrate layers so as to allow the second substrate layer to show through the cracks of the layer of ink. The cracked layer of printing ink comprises mirror-effect ink, that reflects light through the first translucent or transparent substrate layer. The cracking of the layer of ink is achieved when the card is manufactured by laminating it.

The present invention provides a method of inkjet printing, comprising: (i) inkjet printing an inkjet ink on to a substrate, wherein the ink comprises: an N-vinyl monomer selected from N-vinyl caprolactam, N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl carbazole, N-vinyl formamide, N-vinyl indole, N-vinyl imidazole, N-vinyl acetamide, and mixtures thereof; one or more difunctional monomers; and a radical photoinitiator; and (ii) curing the ink by exposing the printed ink to a UV radiation source, wherein the UV radiation source moves relative to the substrate at a speed of 70 m/min or more.

The present invention provides a method of inkjet printing, comprising: (i) inkjet printing an inkjet ink on to a substrate, wherein the ink comprises: an N-vinyl monomer selected from N-vinyl caprolactam, N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl carbazole, N-vinyl formamide, N-vinyl indole, N-vinyl imidazole, N-vinyl acetamide, and mixtures thereof; one or more difunctional monomers; and a radical photoinitiator; and (ii) curing the ink by exposing the printed ink to a UV radiation source, wherein the UV radiation source moves relative to the substrate at a speed of 70 m/min or more.

Opaque grey ink jet ink composition, comprising: a solvent comprising one or more organic solvent compound(s); b) a binder, comprising one or more binding resin(s); wherein the ink jet ink composition further comprises: one or more black pigment(s) and/or one or more black dye(s); one or more white pigment(s); wherein the one or more black pigment(s) and/or the one or more black dye(s) is(are) present in a total amount from 0.01% to 9% by weight, of the total weight of the ink jet ink composition; wherein the one or more white pigment(s) is(are) present in a total amount from 0.5% to 30% by weight, of the total weight of the ink jet ink composition; and wherein the ratio:amount by weight of the one or more black pigment(s) and/or the one or more black dye(s)/amount by weight of the one or more white pigment(s) is from 0.001 to 1.

Opaque grey ink jet ink composition, comprising: a solvent comprising one or more organic solvent compound(s); b) a binder, comprising one or more binding resin(s); wherein the ink jet ink composition further comprises: one or more black pigment(s) and/or one or more black dye(s); one or more white pigment(s); wherein the one or more black pigment(s) and/or the one or more black dye(s) is(are) present in a total amount from 0.01% to 9% by weight, of the total weight of the ink jet ink composition; wherein the one or more white pigment(s) is(are) present in a total amount from 0.5% to 30% by weight, of the total weight of the ink jet ink composition; and wherein the ratio:amount by weight of the one or more black pigment(s) and/or the one or more black dye(s)/amount by weight of the one or more white pigment(s) is from 0.001 to 1.

An optical fiber having an ink layer that includes an optical brightener is described. The optical brightener is a marker that permits identification of the fiber. The ink layer may also include a pigment, where either or both of the pigment and optical brightener may function as a marker for identifying the fiber. Bundles of two or more optical fibers, each of which includes an ink layer containing an optical brightener, are also described.

An article including a magnetic-containing layer having a first surface and a second surface opposite the first; a first reflector layer external to the first surface of the magnetic-containing layer; a second reflector layer external to the second surface of the magnetic-containing layer; a first selective light modulator layer external to the first reflector layer; a second selective light modulator layer external to the second reflector layer; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein at least one of the first and second selective light modulator layers comprises at least one of a curing agent, and at least one coating aid is disclosed. Methods of making the disclosed article are also disclosed.

Provided is an ink jet recording ink containing a near-infrared absorbing colorant represented by Formula 1, a polymerizable monomer, a polymerization initiator, and a dispersant, in which a content of the polymerizable monomer is 50% by mass or more with respect to a total amount of the ink jet recording ink, and a difference between an SP value of the polymerizable monomer and an SP value of the dispersant is 3.8 MPa.sup.1/2 to 16.0 MPa.sup.1/2. Also provided is an ink jet recording method.

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The description of a ring A, a ring B, X.sup.A, X.sup.B, G.sup.A, G.sup.B, kA, and kB in Formula 1 will not be repeated.