Silverbrook Research Pty Ltd

Sutharsiny Indusegaram

Damon Donald Ridley

Simone Charlotte Vonwiller

Kia Silverbrook

Scott Matthew Starling

Lachlan Everett Hall

Graciel Gonzaga

Paul Lapstun

Simon Fielder

Maxine Sintic

A method of initiating a requested action in a computer system via a printed substrate. The substrate has human-readable information and machine-readable coded data printed thereon. The coded data is indicative of a substrate identity and of a plurality of locations on the substrate. The method comprises the steps of: (a) interacting with the substrate using an optically imaging sensing device; (b) imaging the coded data; (c) generating indicating data in the sensing device using the imaged coded data, the indicating data identifying the substrate identity and a position of the sensing device relative to the substrate; and communicating the indicating data to the computer system so that the computer system can initiate the requested action. The coded data is printed with an ink comprising an IR-absorbing naphthalocyanine dye.

Method of initiating requested action via substrate printed with naphthalocyanine dye

A salt of a sulfonated dye modulates a stability of the dye, particularly its ozonefastness. The salt comprises an organic cation selected from the group consisting of: wherein:

Sulfonated dye salts having improved stability

A sulfonated dye salt of formula (II): wherein

Gallium naphthalocyanine salts exhibiting reduced kogation

A method of preparing a sultine from a dihalogeno compound. The method comprises the steps of reacting the dihalogeno compound with a hydroxymethanesulfinate salt in a DMSO solvent so as to prepare the sultine.

Method of preparing sultines

A method of formulating an aqueous ink having minimal visible coloration. The method includes the steps of: providing an aqueous ink formulation containing a sulfonated water-soluble IR-absorbing naphthalocyanine dye having a central metal atom moiety; and adjusting a pH of the formulation to a pH value in the range of 4 to 6.5 so as to minimize visible coloration of the formulation.

Method of formulating ink having minimal visible coloration

An ink cartridge for an inkjet printer contains an aqueous ink formulation. The ink formulation comprising an IR-absorbing naphthalocyanine dye of formula (II): or a salt form thereof, wherein:M is Ga(A);Ais an axial ligand selected from &#x2014;OH, halogen, &#x2014;OR, &#x2014;OC(O)Ror &#x2014;O(CHCHO)Rwherein e is an integer from 2 to 10 and Ris H, Calkyl or C(O)Calkyl;Rand Rmay be the same or different and are selected from hydrogen or Calkoxy;Ris selected from Calkyl, Caryl, Carylalkyl or Si(R)(R)(R);Ris selected from Calkyl, Caryl or Carylalkyl; andR, Rand Rmay be the same or different and are selected from Calkyl, Caryl, Carylalkyl, Calkoxy, Caryloxy or Carylalkoxy.The ink formulation has a characteristic pH in the range of 4 to 6.5.

Ink cartridge comprising weakly acidic naphthalocyanine ink formulation

A method of modulating a stability of a sulfonated dye, particularly its ozonefastness is provided. The method comprises providing a salt of the dye, wherein the salt comprises at least one organic cation selected from the group consisting of: wherein:

Method of modulating stability of sulfonated dye

A salt of a sulfonated dye comprising an ammonium cation as a counterion. The ammonium cation comprises at least 3 hydroxyl groups. The salt is useful in reducing kogation in thermal inkjet printheads. One example of these salts is the compound of formula (II): wherein M is Ga(OH); and each of Z, Z, Zand Zis protonated 2,2-bis(hydroxymethyl)-2,2',2&#x2033;-nitrilotriethanol.

Inkjet dyes exhibiting reduced kogation

An aqueous formulation comprises a sulfonated water-soluble IR-absorbing naphthalocyanine dye having a central metal atom moiety. A pH of the formulation is in the range of 4 to 6.5, which minimizes visibility of the formulation.

Aqueous formulation comprising low visibility naphthalocyanine dye

An inkjet ink for use in netpage, Hyperlabel and other applications. The ink includes an IR-absorbing dye of formula (I): wherein

Inkjet ink comprising gallium naphthalocyanine dye

A substrate having an inkjet ink disposed thereon. The ink comprises an IR-absorbing naphthalocyanine dye of formula (I): 

Substrate having inkjet ink comprising naphthalocyanine dye disposed thereon

A method of enabling entry of data into a computer system via a printed substrate. The substrate has a surface containing human-readable information and machine-readable coded data. The coded data is indicative of an identity of the substrate and of a plurality of reference points on the surface. The method includes the steps of: operatively positioning a sensing device relative to the surface and sensing the coded data; generating indicating data using the sensed coded data; and sending the indicating data to a computer system. The coded data comprises an IR-absorbing dye having a nitrogen-substituted phthalocyanine.

Method of enabling data entry using substrate comprising IR-absorbing dye

A method of effecting a one-pot conversion of a tetrahydronaphthalic anhydride of formula (I): to a nitrate salt of a benzisoindolenine of formula (II):  The method comprises heating the tetrahydronaphthalic anhydride of formula (I) with a reagent mixture comprising ammonium nitrate so as to effecting concomitant dehydrogenation during the conversion.

One-pot synthesis of benzisoindolenines used in the preparation of naphthalocyanines

A substrate having an IR-absorbing dye disposed thereon. The IR-absorbing dye is a metal phthalocyanine dye having branched axial ligands. The branched axial ligands minimize interaction between &#x3c0; systems of adjacent dye molecules, and assist in reducing absorption of visible wavelengths.

Substrate having IR-absorbing dye with branched axial ligands

An IR-absorbing naphthalocyanine dye of formula (I): whereinM is Ga(A);Ais selected from the group consisting of: OH and halogen; andW is a sulfonic acid group or salts thereof.

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Balmain, Australia

Sutharsiny Indusegaram