# US 2014/0192106 A1 · Lightfastness control for printers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192106 A1 - Document ID: US20140192106A1 - Status: Published application - Kind: A1 - Application number: 13/736,621 - Filed: 2013-01-08 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Hewlett-Packard Development Company, L.P. - Inventors: Alexey S. Kabalnov; Thomas Jeffrey Winter - Web page: https://patentgrep.com/patent/US20140192106A1 ## CPC - B41M 5/50: Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording {(printing on organic plastics using a printer's form B41M1/30; printing on pre-treated paper with a printer's form B41M1/36)} - H04N 1/52: Circuits or arrangements for halftone screening - B41J 2/2128: {by means of energy modulation (control methods or devices therefor, e.g. driver circuits or control circuits B41J2/04501)} - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract A printer includes an ink reservoir that includes yellow ink, cyan ink, and magenta ink. The printer includes an ink dispenser that employs a yellow distribution setting to increase the drop volume of yellow ink droplets and lower the drop frequency of the yellow ink droplets on the media with respect to the cyan ink droplets and/or magenta ink droplets to control the lightfastness of the print on the media. ## Claims ### Claim 1 A printer, comprising: an ink reservoir that includes yellow ink, cyan ink, and magenta ink; and an ink dispenser that employs a yellow distribution setting to increase the drop volume of yellow ink droplets and lower the drop frequency of the yellow ink droplets on the media with respect to the cyan ink droplets and/or magenta ink droplets to control the lightfastness of the print on the media. ### Claim 2 (depends on 1) The printer of claim 1, further comprising a controller to adjust the yellow distribution setting to control the lightfastness of the print on the media. ### Claim 3 (depends on 2) The printer of claim 2, wherein the controller receives configuration data to adjust the yellow distribution setting and control the amount of lightfastness. ### Claim 4 (depends on 3) The printer of claim 3, wherein the configuration data includes a drop volume setting and a drop frequency setting to control the amount of lightfastness. ### Claim 5 (depends on 3) The printer of claim 3, wherein the configuration data includes an exposure setting which defines an estimated amount of light that the print is exposed to, wherein the exposure setting adjusts the yellow distribution setting to control the amount of lightfastness. ### Claim 6 (depends on 1) The printer of claim 1, wherein the yellow distribution setting is set within a range of about two times the drop volume of the cyan ink droplets or the magenta ink droplets up till the drop volume of about ten times the drop volume of the cyan ink droplets or the magenta in droplets. ### Claim 7 (depends on 1) The printer of claim 1, wherein the yellow distribution setting is set by a mechanical setting in the printer. ### Claim 8 (depends on 7) The printer of claim 7, wherein the mechanical setting is a nozzle size for setting the drop volume of the yellow ink droplets, the cyan ink droplets, or the magenta ink droplets. ### Claim 9 (depends on 1) The printer of claim 1, further comprising an ink jet to distribute the yellow ink droplets, the cyan ink droplets, or the magenta ink droplets. ### Claim 10 (depends on 1) The printer of claim 1, further comprising an electro photography dispenser for the yellow ink droplets, the cyan ink droplets, or the magenta ink droplets, wherein a split between a photoconductor drum and a developer roller in the dispenser is adjusted to control the yellow drop thickness on the media. ### Claim 11 A method comprising: setting a cyan distribution setting for a given drop volume and drop frequency of cyan ink droplets on a media in a printer; setting a magenta distribution setting for a given drop volume and drop frequency of magenta ink droplets on the media in the printer; and setting a yellow distribution setting for an increased drop volume and reduced drop frequency of yellow ink droplets with respect to the drop volume and drop frequency of cyan ink droplets and/or magenta ink droplets to control lightfastness of a print on the media. ### Claim 12 (depends on 11) The method of claim 11, further comprising setting the yellow distribution setting within a range of about two times the drop volume of the cyan distribution setting or the magenta distribution setting up till the density of about ten times the drop volume of the cyan distribution setting or the magenta distribution setting. ### Claim 13 (depends on 11) The method of claim 11, further comprising adjusting the yellow distribution setting in an ink jet printer or in an electro photography printer. ### Claim 14 An apparatus comprising: a cartridge installable in a printer, wherein the cartridge includes yellow ink, cyan ink, and magenta ink for the printer; and an ink dispenser in the cartridge that employs a yellow distribution setting to increase the drop volume of yellow ink droplets and lower the drop frequency of the yellow ink droplets on the media with respect to the cyan ink droplets and/or magenta ink droplets to control the lightfastness of the print on the media. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the ink dispenser provides ink to a nozzle in the printer that distributes ink droplets to create the print on the media.