# US 2013/0158187 A1 · Metallic lep inks and associated methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158187 A1 - Document ID: US20130158187A1 - Status: Published application - Kind: A1 - Application number: 13/820,041 - Filed: 2010-10-29 - Published: 2013-06-20 - Earliest claimed: 2010-10-29 - Assignees: Hewlett-Packard Development Company, L.P. - Inventors: Gal Victor; Galia Golodetz; Jose Kuperwasser; Vladislav Kaploun - Web page: https://patentgrep.com/patent/US20130158187A1 ## CPC - C09D 11/104: Polyesters - C09D 11/52: Electrically conductive inks - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract The present disclosure provides metallic LEP inks and associated methods. In one example, a method of manufacturing a metallic LEP ink having reduced impurities can comprising adding a metallic pigment slurry and a resin to a stainless steel attritor, adding ceramic grinding beads to the attritor, and grinding the metallic pigment and the resin to form the metallic LEP ink. ## Claims ### Claim 1 A method of manufacturing a metallic LEP ink having reduced impurities, comprising: adding a metallic pigment slurry and a resin to a stainless steel attritor; adding ceramic grinding beads to the attritor; and grinding the metallic pigment and the resin to form the metallic LEP ink. ### Claim 2 (depends on 1) The method of claim 1, wherein the reduced impurities are measured as a function of brightness of the metallic LEP ink compared to a comparable LEP ink; the comparable LEP ink having the same components and same amounts as the LEP ink but produced by a second attritor with second grinding beads made from the same material; the metallic LEP ink being brighter than the comparable LEP ink. ### Claim 3 (depends on 2) The method of claim 2, wherein the brightness is measured as optical density, the lower optical density being indicative of a brighter ink, wherein the metallic LEP ink has an optical density at least 5% lower than the comparable LEP ink. ### Claim 4 (depends on 2) The method of claim 2, wherein the second attritor and the second grinding beads are made from stainless steel or ceramic. ### Claim 5 (depends on 1) The method of claim 1, wherein the grinding is performed for at least 1 hour and at a temperature from 20° C. to 60° C. ### Claim 6 (depends on 1) The method of claim 1, wherein the grinding is performed at less than 1000 rpm. ### Claim 7 (depends on 1) The method of claim 1, wherein the metallic slurry comprises a metallic pigment and a solvent. ### Claim 8 (depends on 7) The method of claim 7, wherein the metallic pigment is selected from the group of aluminum, silver, platinum, tin, copper, bronze, gold, and mixtures thereof; and the solvent is selected from the group of paraffins, isoparaffins, oils, alkanes having from about 6 to about 100 carbon atoms, and mixtures thereof. ### Claim 9 (depends on 1) The method of claim 1, wherein the resin is polymerized from monomers selected from the group consisting of ethylene acrylic acid, ethylene methacrylic acid, ethylene acrylic ester maleic anhydride, ethylene acrylic ester glycidyl methacrylate, maleic anhydride, styrene maleic anhydride and mixtures thereof. ### Claim 10 A method of reducing impurities in a metallic LEP ink, comprising adding a metallic pigment slurry and a resin to a stainless steel attritor; adding ceramic grinding beads to the attritor; and grinding the metallic pigment and the resin to form the metallic LEP ink; wherein the reduced impurities are measured as a function of brightness of the metallic LEP ink compared to a comparable LEP ink; the comparable LEP ink having the same components and same amounts as the LEP ink but produced by a second attritor with second grinding beads made from the same material; the metallic LEP ink being brighter than the comparable LEP ink. ### Claim 11 (depends on 10) The method of claim 10, wherein the brightness is measured as optical density, the lower optical density being indicative of a brighter ink, wherein the metallic LEP ink has an optical density at least 5% lower than the comparable LEP ink. ### Claim 12 (depends on 10) The method of claim 10, wherein the grinding is performed for at least 1 hour at a temperature from 20° C. to 60° C. at less than 1000 rpm. ### Claim 13 A metallic LEP ink having reduced impurities, comprising: a metallic pigment; a resin; and a solvent; wherein the metallic LEP ink is produced by a stainless steel attritor and ceramic grinding beads; wherein the reduced impurities are measured as a function of brightness of the metallic LEP ink compared to a comparable LEP ink; the comparable LEP ink having the same components and same amounts as the LEP ink but produced by a second attritor with second grinding beads made from the same material; the metallic LEP ink being brighter than the comparable LEP ink. ### Claim 14 (depends on 13) The metallic LEP ink of claim 13, wherein the metallic pigment is selected from the group of aluminum, silver, platinum, tin, copper, bronze, gold and mixtures thereof; the solvent is selected from the group of paraffins, isoparaffins, oils, alkanes having from about 6 to about 100 carbon atoms, and mixtures thereof; and the resin is selected from the group of ethylene acrylic acid, ethylene methacrylic acid, ethylene acrylic ester maleic anhydride, ethylene acrylic ester glycidyl methacrylate, maleic anhydride, styrene maleic anhydride and mixtures thereof. ### Claim 15 (depends on 13) The metallic LEP ink of claim 13, wherein the brightness is measured as optical density, the lower optical density being indicative of a brighter ink, wherein the metallic LEP ink has an optical density at least 5% lower than the comparable LEP ink.