US3054751A - Magnetic lithographic inks - Google Patents

Magnetic lithographic inks Download PDF

Info

Publication number
US3054751A
US3054751A US783997A US78399758A US3054751A US 3054751 A US3054751 A US 3054751A US 783997 A US783997 A US 783997A US 78399758 A US78399758 A US 78399758A US 3054751 A US3054751 A US 3054751A
Authority
US
United States
Prior art keywords
ink
pigment
magnetic
gms
particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US783997A
Other languages
English (en)
Inventor
Carl B Blake
Lewis F Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US783997A priority Critical patent/US3054751A/en
Priority to CH8237159A priority patent/CH397735A/de
Priority to GB44077/59A priority patent/GB935541A/en
Application granted granted Critical
Publication of US3054751A publication Critical patent/US3054751A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/16—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/10—Treatment with macromolecular organic compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/90—Other properties not specified above

Definitions

  • This invention relates to magnetic lithographic inks and more particularly to oleophilic lithographic inks containing hydrophilic magnetic pigments.
  • Lithographic printing is well known in the art and generally involves the use of a plate having a portion of its surface treated so as to be wetted by a solution which is essentially water, and having the remainder of its surface treated to resist wetting by the solution and to be wetted by an oleophilic ink.
  • the solution is applied to the plate by such applicators as, for example rollers carrying a film of the solution.
  • the plate subsequently contacts an ink laden roller. Ink on the roller is repelled by the water-bearing areas of the plate and accepted by non-water bearing areas thereof.
  • the ink image is subsequently transferred to a work surface which prints the image on a desired sub-strate, such as, for example, a sheet of paper.
  • a desired sub-strate such as, for example, a sheet of paper.
  • Many compositions of suitable inks and fountain solutions are well known in the lithographic printing arts and have been employed for many years.
  • Magnetic inks employ magnetic pigments in powder form. It is essential that a high pigment loading is provided in the ink in order that suitable signal strength will be obtained when the printed characters are sensed by magnetic sensing means. These high pigment loadings of magnetic pigments increase the emulsification tendencies of the ink. This increase results, in substantial part, from the hydrophilicity of magnetic pigment particles. Thus there tends to form, on the ink applying roller of the lithographic press, an emulsification of water picked up from the water wet surface of the plate. This emulsion adversely effects the printing operation, producing a deposition of magnetic ink particles on the water wet plate and a deposition of water particles on the ink receiving areas of the plate. Not only does this produce bad printing and spotty work but also the magnetic characteristics of the printed areas are lowered, adversely affecting subsequent magnet sensing operation.
  • a further object of the invention is to provide better wetting of the pigment particles by the varnishes which latitude in the use of fountain solutions.
  • lithographic inks are contained in lithographic inks to provide better rheological properties of the ink, better printing coverage by the ink, and darker or deeper appearance of the printed ink.
  • a further object of the invention is to provide wider Such latitude is particularly desirable when paper masters or plates are employed. Paper masters are specifically treated and require the use of special fountain solutions which may adversely affect inks and have greater tendencies than other fountain solutions to emulsify with inks.
  • a further object of the invention is to provide a 1itho grahic ink employing magnetic pigments of desirable magnetic properties wherein undesirable coloration properties of the pigment are overcome simultaneously with a reduction in hydrophilicity of the magnetic pigment particles.
  • magnétique pigments will be employed to refer to any of numerous well known magnetic pigments suitable for use in magnetic inks.
  • Such pigments include, for example: gamma ferric oxide with remanences of 1,500 gausses or more, coercivities of between 200 and 400 oerste-ds, and particle size range of 1-10 microns; natural or artificial magnetites of similar properties; unicrystalline iron of similar properties; small particle magnetic alloys; and cobalt, nickel and barium ferrites and similar materials.
  • One general form of treatment which may be employed for reducing the emulsification tendencies of magnetic pigments, such as those listed above, is to coat the pigment particles with a suitable resin.
  • resins may, for example, include: silicones, vinyl acetates, chlorides, polyethylenes, polyamides, phenolics, alkyds, cournaroneindene, and epoxy resins.
  • One method of accomplishing resin coating of pigment particles is by providing the resin in fluid form, such as in a molten state, and stirring the pigment into the resin. Thereafter the resin is cooled and crushed, and the pigment particles are then recovered in coated form.
  • Another fluid coating method involves the use of heated two roller mill dispersion of a pigment in a resin, followed by cooling and chip crushing.
  • Another method which may be employed for coating the pigment particles with a resin involves the deposition of the resin from a solution onto the pigment particles. This may be done, for example, by fractionation or by pigment seeding techniques.
  • pigment seeding pigment particles are added to a supersaturated solution of a resin in a solvent while the resin is precipitated by cooling or by digestion. Precipitated resin will accumulate on the pigment particles and coat each of the particles.
  • fractionation processes the resin is dissolved in a solvent, pigment is then stirred into the solution and while stirring a poor solvent is added to the solution-throwing the resin out of solution. The resin coming out of solution coats the pigment particles thinly and evenly.
  • Resin Good Solvent i Poor Solvent 1 I 1 vinyl chloride tetrahydrofuran' benzene. 2 chlorinated paraffin. nitrobenzene methylalcohol. 3 rain ethanol water.
  • the amount of resin precipitated should be equal to the oil absorption of the pigment, i.e., the amount of resin precipitated should be sufficient to cover all of the powder surface.
  • a second general form of treatment which may be employed for reducing the emulsification tendencies of pigments, such as those listed above, is to coat the pigments with dye surfactants by laking procedures.
  • dyestuffs in the form of molecular chains having one end portions of hydrophilic nature and the other end portion of oleophilic nature.
  • Various well known dyestuffs may be employed and upon application to magnetic pigment particles, attach to the particle by their hydrophilic portion leaving their oleophilic portion extending outwardly from the pigment particles and presenting hydrophobic surfaces to any water particles which may be encountered.
  • Example 1 The following materials are mixed to form a slurry:
  • red colorant as red lake 7013.
  • a third general form of treatment which may be eni-i ployed for reducing the emulsification tendencies of ma netic pigments such as those listed above, is to treat the pigment with chemically reactive materials giving rise to phosphatizing, nitrating and other surface reactions on the pigment particles which will provide roughened pigment particle surfaces and improved pigment particle hydrophobicity. Such treatments will result in improved wetting of pigment particles by the resins in an ink formulation. Such processes are well known in the art and need not be described in detail herein.
  • Viscosity Z 5 /2 at 77 F.
  • black colorant consisting of 20 parts impingement black, particle size 24 millimicrons, flushed into #0 and #3 bodied linseed oils.
  • a fourth general form of treatment which may be employed for reducing the emulsification tendencies of magnetic pigments involves mixing the pigments with suitable surface active agents.
  • suitable surface active agents such as those set forth in the following examples may be either mixed directly with the dry magnetic pigment or, preferably may be dissolved in a solvent into which the magnetic pigments are stirred, whereupon the solvents are evaporated off, leaving the pigment particles coated with the surface active agent.
  • the use of the solvent coating technique provides improved uni-formity of coating.
  • Certain surface active agents are then desirably treated to improve their effectiveness in reducing the hydrophilicity of the pigment particles.
  • Example 1 5% by Weight ricinoleic acid mixed with 95% by weight of a ferric iron oxide magnetic pigment such as IRN-100. While the ricinoleic acid is preferably mixed with a solvent such as heptane B, the mix may be made in dry powder form. After the materials are tho-roughly mixed and, if solvent is used, the solvent driven off, the coated magnetic particles are employed as pigment in a suitable magnetic ink formulation such as numerous formulations well known in the art.
  • a suitable magnetic ink formulation such as numerous formulations well known in the art.
  • a ferric. oxide such as IRN-10O
  • surface active agents which may be employed are: organic aluminum compounds, oil soluble non-ionic ammonium surfactants, and other applicable anionic and cationic surfactants.
  • i'Following is an example of an ink formulation embodying pigment particles treated by the fourth form of treattfnent described above:
  • black colorant base consisting of 20 parts by Weight of impingement carbon black, particle size 24 millimicrons, flushed into #0 and #3 bodied linseed oil.
  • An oleophilic lithographic ink consisting essentially of a minor proportion of an oleophilic ink vehicle and a major proportion of a magnetizable hydrophobic pigment, said pigment consisting of normally hydrophilic magnetizable particles having a largest dimension of 10 microns or less and a relatively thin coating deposited on said particles, said coating having an external surface which is substantially hydrophobic and wettable by said vehicle whereby a magnetizable water-repelling ink is provided.
  • a surface active agent selected from the class consisting of ricinoleic acid, organic aluminum compounds, oil soluble non-ionic ammonium surfactants and the reaction product of a mixture of di-alkyl quaternary ammonium chloride and an ethoxy-lated amine acetate with sodium hydroxide.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
US783997A 1958-12-30 1958-12-30 Magnetic lithographic inks Expired - Lifetime US3054751A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US783997A US3054751A (en) 1958-12-30 1958-12-30 Magnetic lithographic inks
CH8237159A CH397735A (de) 1958-12-30 1959-12-28 Druckfarbe mit magnetischen Farbstoffteilchen und Verfahren zur Herstellung derselben
GB44077/59A GB935541A (en) 1958-12-30 1959-12-29 Magnetic lithographic inks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US783997A US3054751A (en) 1958-12-30 1958-12-30 Magnetic lithographic inks

Publications (1)

Publication Number Publication Date
US3054751A true US3054751A (en) 1962-09-18

Family

ID=25131048

Family Applications (1)

Application Number Title Priority Date Filing Date
US783997A Expired - Lifetime US3054751A (en) 1958-12-30 1958-12-30 Magnetic lithographic inks

Country Status (3)

Country Link
US (1) US3054751A (de)
CH (1) CH397735A (de)
GB (1) GB935541A (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185589A (en) * 1961-12-21 1965-05-25 Ibm Method of coating finely divided metal particles
US3207622A (en) * 1962-03-05 1965-09-21 Standard Oil Co Method of producing hydrophobicorganophilic magnetic pigments
US3247117A (en) * 1960-05-06 1966-04-19 Dick Co Ab Magnetic lithographic ink
US3294686A (en) * 1966-12-27 Pigment particles coated with organo-alumtnum compounds
US3519452A (en) * 1967-03-09 1970-07-07 Cabot Corp Sulfonated carbon black pigmented compositions
US3547822A (en) * 1968-02-01 1970-12-15 Eastman Kodak Co Scum-retardant carrier particles and compositions thereof
US3905935A (en) * 1973-01-15 1975-09-16 Hercules Inc Dye laking resins for printing inks
US3929657A (en) * 1973-09-05 1975-12-30 Xerox Corp Stoichiometric ferrite carriers
US3947371A (en) * 1972-11-21 1976-03-30 Xerox Corporation Developer material with poly(p-xylylene) coated carrier
US4018601A (en) * 1969-06-19 1977-04-19 Xerox Corporation Electrostatographic magnetic brush imaging process employing carrier beads comprising high purity nickel
US4025690A (en) * 1970-07-06 1977-05-24 Reagens S.P.A. Industria Chimica Method of preparing additives and additives prepared according to said method
US4107063A (en) * 1977-03-02 1978-08-15 International Business Machines Corporation Water based selectable charge magnetic inks
US4285994A (en) * 1977-08-17 1981-08-25 Johnson, Matthey & Co., Limited Process for production of free flowing dust-free pigments
US5127952A (en) * 1986-10-10 1992-07-07 Rohne-Poulenc Chimie Core/oxide/dye pigmentary colorants
US20050046176A1 (en) * 2003-08-26 2005-03-03 Crum Jesse D. Communication substrates having variably applied ferromagnetic material, ferromagnetic composition and a system and method of applying the material to a substrate
US20100098921A1 (en) * 2008-10-14 2010-04-22 Sandvik Innovations, Llc Magnetic load supporting inks

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357164A (en) * 1979-12-11 1982-11-02 Sakata Shokai, Ltd. Ink composition for waterless lithography and methods of printing therefrom
FR2618084B1 (fr) * 1987-07-15 1989-11-10 Rhone Poulenc Chimie Microspheres magnetisables a base de polysiloxane, leur procede de preparation et leur application en biologie

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US607875A (en) * 1898-07-26 Process of producing magnetic oxid of iron
US1960899A (en) * 1929-07-05 1934-05-29 A V De Forest Associates Magnetic testing material and method of preparing the same
US2232352A (en) * 1936-04-29 1941-02-18 Rca Corp Production of magnetic material
US2267999A (en) * 1939-03-20 1941-12-30 Robert C Switzer Magnetic testing
US2346968A (en) * 1942-09-15 1944-04-18 Interchem Corp Typographic printing ink
US2346969A (en) * 1942-09-15 1944-04-18 Interchem Corp Printing ink
US2384579A (en) * 1941-08-20 1945-09-11 Harmon Color Works Inc Iron pigments
US2559505A (en) * 1948-02-03 1951-07-03 Rca Corp Art of making duplicate magnetic phonograph records
US2601212A (en) * 1948-11-09 1952-06-17 Gen Aniline & Film Corp Heat resistant magnetic cores and method of making
US2684909A (en) * 1951-09-11 1954-07-27 Time Inc Zein ink vehicle
US2688649A (en) * 1951-12-14 1954-09-07 Bjorksten Res Lab For Electroc Printed battery and method for making
US2800458A (en) * 1953-06-30 1957-07-23 Ncr Co Oil-containing microscopic capsules and method of making them
US2875152A (en) * 1955-12-20 1959-02-24 Shell Dev Process for the preparation of greases gelled with non-soap gelling agents
US2920042A (en) * 1955-03-28 1960-01-05 Texaco Inc Method for preparing water resistant grease and hydrophobic finely-divided solids

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US607875A (en) * 1898-07-26 Process of producing magnetic oxid of iron
US1960899A (en) * 1929-07-05 1934-05-29 A V De Forest Associates Magnetic testing material and method of preparing the same
US2232352A (en) * 1936-04-29 1941-02-18 Rca Corp Production of magnetic material
US2267999A (en) * 1939-03-20 1941-12-30 Robert C Switzer Magnetic testing
US2384579A (en) * 1941-08-20 1945-09-11 Harmon Color Works Inc Iron pigments
US2346969A (en) * 1942-09-15 1944-04-18 Interchem Corp Printing ink
US2346968A (en) * 1942-09-15 1944-04-18 Interchem Corp Typographic printing ink
US2559505A (en) * 1948-02-03 1951-07-03 Rca Corp Art of making duplicate magnetic phonograph records
US2601212A (en) * 1948-11-09 1952-06-17 Gen Aniline & Film Corp Heat resistant magnetic cores and method of making
US2684909A (en) * 1951-09-11 1954-07-27 Time Inc Zein ink vehicle
US2688649A (en) * 1951-12-14 1954-09-07 Bjorksten Res Lab For Electroc Printed battery and method for making
US2800458A (en) * 1953-06-30 1957-07-23 Ncr Co Oil-containing microscopic capsules and method of making them
US2920042A (en) * 1955-03-28 1960-01-05 Texaco Inc Method for preparing water resistant grease and hydrophobic finely-divided solids
US2875152A (en) * 1955-12-20 1959-02-24 Shell Dev Process for the preparation of greases gelled with non-soap gelling agents

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294686A (en) * 1966-12-27 Pigment particles coated with organo-alumtnum compounds
US3247117A (en) * 1960-05-06 1966-04-19 Dick Co Ab Magnetic lithographic ink
US3185589A (en) * 1961-12-21 1965-05-25 Ibm Method of coating finely divided metal particles
US3207622A (en) * 1962-03-05 1965-09-21 Standard Oil Co Method of producing hydrophobicorganophilic magnetic pigments
US3519452A (en) * 1967-03-09 1970-07-07 Cabot Corp Sulfonated carbon black pigmented compositions
US3547822A (en) * 1968-02-01 1970-12-15 Eastman Kodak Co Scum-retardant carrier particles and compositions thereof
US4018601A (en) * 1969-06-19 1977-04-19 Xerox Corporation Electrostatographic magnetic brush imaging process employing carrier beads comprising high purity nickel
US4025690A (en) * 1970-07-06 1977-05-24 Reagens S.P.A. Industria Chimica Method of preparing additives and additives prepared according to said method
US3947371A (en) * 1972-11-21 1976-03-30 Xerox Corporation Developer material with poly(p-xylylene) coated carrier
US3905935A (en) * 1973-01-15 1975-09-16 Hercules Inc Dye laking resins for printing inks
US3929657A (en) * 1973-09-05 1975-12-30 Xerox Corp Stoichiometric ferrite carriers
US4107063A (en) * 1977-03-02 1978-08-15 International Business Machines Corporation Water based selectable charge magnetic inks
US4285994A (en) * 1977-08-17 1981-08-25 Johnson, Matthey & Co., Limited Process for production of free flowing dust-free pigments
US5127952A (en) * 1986-10-10 1992-07-07 Rohne-Poulenc Chimie Core/oxide/dye pigmentary colorants
US20050046176A1 (en) * 2003-08-26 2005-03-03 Crum Jesse D. Communication substrates having variably applied ferromagnetic material, ferromagnetic composition and a system and method of applying the material to a substrate
US6977114B2 (en) * 2003-08-26 2005-12-20 Ward/Kraft, Inc. Communication substrates having variably applied ferromagnetic material, ferromagnetic composition and a system and method of applying the material to a substrate
US20100098921A1 (en) * 2008-10-14 2010-04-22 Sandvik Innovations, Llc Magnetic load supporting inks

Also Published As

Publication number Publication date
GB935541A (en) 1963-08-28
CH397735A (de) 1965-08-31

Similar Documents

Publication Publication Date Title
US3054751A (en) Magnetic lithographic inks
EP0797637B1 (de) Wässrige tinten und beschichtungen enthaltend kohlenstoffprodukte
DE69326338T2 (de) Verkapselte magnetische teilchen, pigmente und russ, verbindungen und damit verbundene verfahren
US4705567A (en) Ink jet compositions with insoluble dye complexes
US6074467A (en) Jet ink and process for preparing dispersion of colored fine particles for jet ink
US5795376A (en) Coated pigment and colorant composition
US4464203A (en) Highly concentrated, dust-free, solid and readily dispersible pigment formulations and their use
CA1096712A (en) Pigment compositions and methods of preparation
BR0211138B1 (pt) Composição contendo um pigmento aquoso, processo de preparação de uma composição contendo um pigmento aquoso e sua aplicação
EP0921163B1 (de) Pigmentzusammensetzung und damit hergestellte wässrige Pigmentdispersion
WO2001040390A1 (en) Wet rub resistant ink compositions
DE60112452T2 (de) Tinte enthaltend eine orange azolackpigmentzusammensetzung
US2296382A (en) Dispersion of hydrophile pigments
US3375123A (en) Pigment preparations
JP3740706B2 (ja) 被覆処理顔料、その製造方法および着色剤組成物
US2327472A (en) Phthalocyanine pigment and method of preparing same
JP2003138161A (ja) 顔料組成物、顔料分散液及びそれらの製造方法
US3361677A (en) Method for making fluorescent precipitation pigments
JP2773263B2 (ja) アゾレーキ顔料の表面処理方法
JP3882358B2 (ja) 顔料組成物およびそれを使用した水系顔料分散体
JP3236804B2 (ja) アゾレーキ顔料組成物、その製造方法及び顔料分散体
US2774677A (en) Phthalocyanine lakes
JP2924473B2 (ja) オフセットインキ用顔料組成物およびその使用
US2333197A (en) Dispersion of hydrophilic pigments
US2350524A (en) Azo pigment dyestuff and coating composition