Hewlett-packard Development Company, L.p.

Claire Harley

Keshava A Prasad

Dennis Z Guo

Kenneth Hickey

Kevin Rattigan

Niamh Kelly

The present disclosure relates to magenta inkjet inks having a quinacridone pigment and an azo pigment. The azo pigment has at least one azo compound having the formula (I), in which Ris selected from H, aryl and Cto Calkyl, and R, Rand Rare each independently selected from H, a Cto Calkyl, an oxygen-containing, a nitrogen-containing and a sulphur-containing functional group. Where Ris aryl, the aryl is not a phenyl group having at least one hydrogen atom that has been substituted with a chlorine atom. 

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Leixlip, Ireland

Claire Harley