Use of hydrolyzed Reactive Red 23
AssigneeHewlett-Packard Company
InventorsJohn L Stoffel, Peter C. Morris
Life of this patent
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Abstract
Reactive Red 23 magenta dye that is hydrolyzed to produce a passivated form having improved lightfastness in inkjet ink.
Claims8
A high lighffastness magenta dye comprising hydrolyzed Reactive Red 23 with from 0 to 100% hydroxy form and from 0 to 100% vinyl form of hydrolyzed Reactive Red 23:
A set of ink-jet inks for ink-jet printing, at least one of the inks being a magenta ink comprising a high lightfastness magenta dye, the high lightfastness magenta dye comprising hydrolyzed Reactive Red 23 with from 0 to 100% hydroxy form and from 0 to 100% vinyl form:
A method of making a passivated form of Reactive Red 23 comprising hydrolyzing Reactive Red 23 to obtain hydrolyzed Reactive Red 23 with from 0 to 100% hydroxy form and from 0 to 100% vinyl:
Dependencies are inferred from the claim text.