Memjet Technology Limited

Richard Myors

Iain Blake

David Alvin Tyvoll

Simon Fielder

Teruyuki Fukuda

Jognandan Prashar

Satoshi Tanaka

Christopher Barton

Michele Gimona

Adrian Peter Bisson

Michele Shepard

Roger Davey

Steven Carter

Stephen Bernard

Philippa Read

Luke Grassy

A method of inkjet printing includes the steps of: printing a first ink onto a print medium, the first ink including a first self-dispersible pigment, the first ink having a first pigment content A; and subsequently printing a second ink onto the print medium at least partially over the first ink, the second ink including a second pigment and a polymeric dispersant encapsulating the second pigment, the second ink having a second pigment content B. The first self-dispersible pigment and the second pigment have a same color; the pigment content A of the first ink and the pigment content B of the overprinted second ink have a relationship 0.8&#x2266;A/B&#x2266;1.2; and a polymer acid value of the polymeric dispersant is in the range of 100 to 170.

Method of printing pigment-based inks including ink sets, inks and printers therefor

An inkjet ink for improving printhead lifetimes includes: an aqueous-based ink vehicle; a colorant; an anti-kogation additive; and an anti-corrosion additive having at least one acetylenic group, the acetylenic group being absent any tertiary or quaternary &#x3b1;-carbon atoms.

Ink additive combinations for improving printhead lifetime

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Sydney, Australia

Richard Myors