Printing conductive inks
A conductive ink containing conductive, metallic particulates is printed onto a substrate by waterless printing on a lithographic press using a relief image plate in a flexographic coating unit or in a lithographic printing unit without fountain solution to provide a layer of conductive print on the substrate. The other units of a sheetfed press may be used to print decorative ink, including full-color printing, further conductive layers, and/or dielectric materials.
1 . A method of printing a conductive ink onto a substrate, comprising:
printing the conductive ink on a lithographic press using a relief image plate in at least one of a flexographic coating unit and a lithographic printing unit without fountain solution to provide a layer of conductive print on the substrate.
2 . A method of printing according to claim 1 , wherein the conductive ink comprises conductive metal particles.
3 . A method according to claim 1 , wherein the conductive ink comprises silver flakes.
4 . A method according to claim 1 , wherein said lithographic press is a sheetfed lithographic press.
5 . A method according to claim 1 , wherein the conductive ink is printed using an imaged photopolymer plate or relief plate.
6 . A method according to claim 1 , wherein the flexographic coating unit or the lithographic printing unit comprises a rough ground blanket.
7 . A method according to claim 1 , wherein the relief image plate has a thickness of from about 0.1 mm to about 0.8 mm.
8 . A method according to claim 1 , wherein the relief image plate is mounted on an image cylinder with a resilient backing material therebetween.
9 . A method of preparing a substrate having a conductive layer of print, comprising:
printing a conductive ink on a substrate on a sheetfed lithographic printing press using a relief image plate in at least one of a flexographic coating unit and a lithographic printing unit,
printing at least one other material on the substrate with unit of the printing press.
10 . A method according to claim 9 , wherein the at least one other material is a colored, non-conductive ink.
11 . A method according to claim 5 , wherein the at least one other material is a dielectric material.
12 . A method according to claim 9 , wherein four lithographic units of the lithographic printing press print process color and the conductive ink is printed in a flexographic coating unit.
13 . A method according to claim 9 , wherein a conductive circuit is printed.
14 . A method according to claim 9 , wherein an electric device having at least one conductive layer and at least one layer of a dielectric material is printed.
15 . A method according to claim 9 , wherein the conductive ink is printed in the flexographic coating unit and at least one lithographic printing unit,
16 . A method according to claim 9 , wherein a dielectric material is printed using a further unit of the printing press.
17 . An article printed according to the method of claim 9 .
18 . A printed circuit printed according to the method of claim 9 .
19 . An RFID tag printed according to the method of claim 9 .
20 . A full-color print having one or more conductive areas printed according to the method of claim 12 .
21 . A method of printing, comprising printing with an imaged relief plate on a lithographic printing unit.
22 . A method according to claim 21 , wherein the image relief plate is mounted on an image roller of the printing unit with a resilient material therebetween.
23 . A method according to claim 22 , wherein the resilient material is paper.