Enhancement of waterfastness using a polyamineani

专利名称：Enhancement of waterfastness using a

polyamine/anionic dye mixture with an acidicfixer

发明人：Tsao, Yi-Hua申请号：EP06076661.5申请日：20021016公开号：EP1724312A2公开日：20061122

摘要：A system for printing images with improved waterfastness, and methods forprinting an image having improved waterfastness are disclosed. The system comprises afirst pen containing an ink composition, wherein the ink composition comprises effectiveamounts of an anionic dye, a polyamine, and an ink vehicle; a second pen containing anacidic fixer composition, wherein the acidic fixer composition comprises an effectiveamount of an acid and an ink-vehicle. The first pen and the second pen are configured toprint the ink composition and the acidic fixer composition, respectively, onto a substratesuch that the ink composition and the acidic fixer composition are in contact on thesubstrate. The amount of acid fixer utilized can be sufficient to protonate substantially allof the polyamines while not protonating the anionic dye, though a lesser or greateramount can also be used with success.

申请人：Hewlett-Packard Company

地址：3000 Hanover Street Palo Alto, California 94304-1112 US

国籍：US

代理机构：Kirsch, Susan Edith

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