Abstract: An ink comprises a high-boiling gylcol and an edible colorant with optional further ingredients. The ink is an edible ink that is preferably suitable for application to substrates, especially food products, using ink-jet printing.

Abstract: An ink jet printer for printing a cationic ink jet ink is provided. The printer comprises a print head for printing the ink onto a substrate, a heating means for heating the ink on the substrate, and a source of radiation for curing the heated ink.

Abstract: A solid state radiation source array is provided, the array comprising at least one solid state ultraviolet radiation source and at least one solid state infrared radiation source.

Abstract: A process of manufacturing a solar cell is provided. The process comprising the steps of: i) ink jet printing an alkali removable water insoluble hot melt ink jet ink onto a substrate comprising a silicon wafer to form a resist image on the substrate; ii) etching or plating the substrate in an aqueous acid medium; and iv) removing the resist image with an aqueous alkali.

Abstract: The invention relates to a process of ink jet printing which comprises the steps of printing an ink onto a substrate and curing the ink using radiation from an LED. The invention also relates to a cationic ink jet ink for use in such a process, the ink comprising a cationically curable component including at least one oxirane, cyclic ester or cyclic carbonate monomer and a photoinitiation system including an iodonium salt photoinitiator and a sensitizer, the photoinitiation system being able to absorb radiation at a wavelength in the range of from 300 nm to 420 nm.

Abstract: The invention relates to an ink jet printing process which comprises the steps of i) applying a radiation-curable primer to a substrate to form a layer of primer, ii) ink jet printing a radiation-curable ink onto the primer layer, and iii) curing the primer and the ink, wherein the viscosity of the primer increases rapidly after application to the substrate.

Abstract: An energy-curable ink jet ink comprising an epoxide monomer, a cationic photoinitiator other than a sulphonium initiator, and ?-butyrolactone and an optional oxetane monomer that exhibits a satisfactory level of cure and has a sufficiently low viscosity to be employed in ink jet printing. The weight ratio of epoxide monomer to ?-butyrolactone is within the range of from 15:1 to 2.5:1.