EP0943451A1 - A method for making positive working printing plates from a heat mode sensitive imaging element - Google Patents
A method for making positive working printing plates from a heat mode sensitive imaging element Download PDFInfo
- Publication number
- EP0943451A1 EP0943451A1 EP99200336A EP99200336A EP0943451A1 EP 0943451 A1 EP0943451 A1 EP 0943451A1 EP 99200336 A EP99200336 A EP 99200336A EP 99200336 A EP99200336 A EP 99200336A EP 0943451 A1 EP0943451 A1 EP 0943451A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- imaging element
- printing plate
- heat mode
- making
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
- B41C1/1016—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials characterised by structural details, e.g. protective layers, backcoat layers or several imaging layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/02—Positive working, i.e. the exposed (imaged) areas are removed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/06—Developable by an alkaline solution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/14—Multiple imaging layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/20—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by inorganic additives, e.g. pigments, salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/22—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by organic non-macromolecular additives, e.g. dyes, UV-absorbers, plasticisers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/24—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/26—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions not involving carbon-to-carbon unsaturated bonds
- B41C2210/262—Phenolic condensation polymers, e.g. novolacs, resols
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Materials For Photolithography (AREA)
Abstract
Description
More specifically the invention is related to a heat mode imaging element for preparing a lithographic printing plate with a higher sensitivity.
- image-wise exposing a heat mode recording material containing on a support (i) a recording layer containing a radiation to heat converting substance and an image forming substance and optionally (ii) a surface layer thereby
- decomposing said recording layer and optionally said surface layer in the exposed areas and
- rubbing said heat mode recording material to remove said optional surface layer and said recording layer in the exposed areas. Said material is not developed with a developing solution.
- Preparation of the lithographic base A 0.30 mm thick aluminum foil was degreased by immersing the foil in an aqueous solution containing 5 g/l cf sodium hydroxide at 50°C and rinsed with demineralized water. The foil was then electrochemically grained using an alternating current in an aqueous solution containing 4 g/l of hydrochloric acid, 4 g/l of hydroboric acid and 5 g/l. of aluminum ions at a temperature of 35°C and a current density of 1200 A/m2 to form a surface topography with an average center-line roughness Ra of 0.5 mm.After rinsing with demineralized water the aluminum foil was then etched with an aqueous solution containing 300 g/l of sulfuric acid at 60°C for 180 seconds and rinsed with demineralized water at 25°C for 30 seconds.The foil was subsequently subjected to anodic oxidation in an aqueous solution containing 200 g/l of sulfuric acid at a temperature of 45°C, a voltage of about 10 V and a current density of 150 A/m2 for about 300 seconds to form an anodic oxidation film of 3.00 g/m2 of Al2O3 then washed with demineralized water, posttreated with a solution containing polyvinylphosphonic acid and washed with demineralized water at 20°C during 120 seconds and dried.
- The first layer was coated from THF/2-methoxypropanol (in a ratio of 55/45) at a wet thickness of 14 µm resulting in a dry coating weight of 1.10 g/m2. This resulted in the following dry composition: 0.970 g/m2 of Alnovol SPN452 (cresol novolac from Hoechst) and 0.130 g/m2 of 3,4,5-trimethoxybenzoic acid (available from Aldrich).
- The top layer was coated from MEK/Dowanol in a ratio of 50/50 at a wet thickness of 20 µm resulting in a dry coating weight of 0.146 g/m2. This resulted in the following dry coating composition : 0.115 g/m2 of Special Schwarz 250 (carbon black available from Degussa), 0.003 g/m2 of Solsperse 5000 (dispersing agent available fron ICI), 0.011 g/m2 of Solsperse 28000 (dispersing agent available from ICI), 0.011 g/m2 of Nitrocellulose E950 (available from Wolff Walsrode), 0.005 g/m2 of Tego Glide 410 (dispersing agent available from Tego Chemie Service GmbH) and 0.002 g/m2 of Tego Wet 265 (dispersing agent available from Tego Chemie Service GmbH).
- The first layer was coated on a lithographic base as described in example 1 from THF/2-methoxypropanol (in a ratio of 55/45) at a wet thickness of 14 µm resulting in a dry coating weight of 1.10 g/m2. This resulted in the following dry composition : 0.780 g/m2 of Alnovol SPN452 (novolac from Hoechst), 0.133 g/m2 of 3,4,5-trimethoxybenzoic acid (available from Aldrich), 0.027 g/m2 of Printex G (carbon black available from Degussa) and 0.160 g/m2 of Alnovol SPN400 (novolac from Hoechst).
- The same top layer as described in example 1 was used for this example.
- The same top layer as described in example 1 was used for this example.
- The first layer was coated on a lithographic base as described in example 1 from THF/2-methoxypropanol (in a ratio of 55/45) at a wet thickness of 14 µm resulting in a dry coating weight of 1.10 g/m2. This resulted in the following dry composition : 0.970 g/m2 of Alnovol SPN452 (cresol novolac from Hoechst) and 0.130 g/m2 of 3,4,5-trimethoxybenzoic acid (available from Aldrich).
- The top layer was coated from MEK/Dowanol in a ratio of 50/50 at a wet thickness of 20 µm resulting in a dry coating weight of 0.146 g/m2. This resulted in the following dry coating composition : 0.197 g/m2 of Special Schwarz 250 (carbon black available from Degussa), 0.005 g/m2 of Solsperse 5000 (dispersing agent available fron ICI), 0.019 g/m2 of Solsperse 28000 (dispersing agent available from ICI), 0.019 g/m2 of Nitrocellulose E950 (available from Wolff Walsrode), 0.007 g/m2 of Tego Glide 410 (dispersing agent available from Tego Chemie Service GmbH) and 0.003 g/m2 of Tego Wet 265 (dispersing agent available from Tego Chemie Service GmbH).
IR-sensitivity and corresponding dot area for the 4 examples | |||||||
Example 1 | Example 2 | Example 3 | Example 4 | ||||
234 mJ/cm2 | 48 % | 186 mJ/cm2 | 48 % | 166 mJ/cm2 | 48 % | 265 mJ/cm2 | 54 % |
Claims (10)
- A heat mode imaging element for making a lithographic printing plate having on a lithographic base with a hydrophilic surface a first layer -including a polymer, soluble in an aqueous alkaline solution and a top layer on the same side of the lithographic base as the first layer which top layer is unpenetrable for or insoluble in an alkaline developer containing SiO2 in the form of silicates ; characterized in that said first layer and said top layer comprise a compound capable of converting IR-light into heat.
- A heat mode imaging element for making a lithographic printing plate according to claim 1 wherein said polymer included in the first layer is a hydrophobic polymer.
- A heat mode imaging element for making a lithographic printing plate according to claim 2 wherein said hydrophobic polymer is a novolac resin or a polymer comprising hydroxystyrene units.
- A heat mode imaging element for making a lithographic printing plate according to any of claims 1 to 3 wherein said first layer comprises a compound selected from the group consisting of low molecular acids and benzophenones.
- A heat mode imaging element for making a lithographic printing plate according to any of claims 1 to 4 wherein said compound capable of converting IR-light into heat is an IR dye or pigment.
- A heat mode imaging element for making a lithographic printing plate according to any of claims 1 to 5 wherein said compound capable of converting IR-light into heat does not decrease the solubility of the first layer in aqueous alkaline solution.
- A heat mode imaging element for making a lithographic printing plate according to any of claims 1 to 6 wherein said compound capable of converting IR-light into heat is present in said first layer in an amount of 0.1 to 30 parts by weight of the total weight of said first layer.
- A heat mode imaging element for making a lithographic printing plate according to any of claims 1 to 7 wherein said top layer comprises a binder which is insoluble in an aqueous alkaline solution.
- A heat mode imaging element for making a lithographic printing plate according to any of claims 1 to 8 wherein said IR dye or pigment is present in said top layer in an amount between 1 and 99 parts by weight of the total weight of said top layer.
- A method for making a lithographic printing plate comprising the steps ofa) exposing imagewise to IR-radiation a heat mode imaging element according to any of claims 1 to 9; andb) developing said imagewise exposed heat mode imaging element with said alkaline developer whereby the exposed areas of the first and the top layer are dissolved and the unexposed areas of the first layer remain undissolved.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99200336.8A EP0943451B3 (en) | 1998-03-14 | 1999-02-05 | A heat mode imaging element and a method for making positive working printing plates from said heat mode imaging element |
DE69901642.8T DE69901642T3 (en) | 1998-03-14 | 1999-02-05 | A process for producing a positive-working printing plate from a thermosensitive image-recording material |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98200831 | 1998-03-14 | ||
EP98200831 | 1998-03-14 | ||
EP99200336.8A EP0943451B3 (en) | 1998-03-14 | 1999-02-05 | A heat mode imaging element and a method for making positive working printing plates from said heat mode imaging element |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0943451A1 true EP0943451A1 (en) | 1999-09-22 |
EP0943451B1 EP0943451B1 (en) | 2002-06-05 |
EP0943451B3 EP0943451B3 (en) | 2018-12-12 |
Family
ID=26150123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99200336.8A Expired - Lifetime EP0943451B3 (en) | 1998-03-14 | 1999-02-05 | A heat mode imaging element and a method for making positive working printing plates from said heat mode imaging element |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0943451B3 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1142707A1 (en) * | 2000-04-07 | 2001-10-10 | Fuji Photo Film Co., Ltd. | Heat-sensitive lithographic printing plate precursor |
EP1156371A2 (en) * | 2000-05-15 | 2001-11-21 | Fuji Photo Film Co., Ltd. | Replenishing method of planographic printing plate developer |
EP1162063A2 (en) | 2000-06-05 | 2001-12-12 | Fuji Photo Film Co., Ltd. | Planographic printing plate precursor |
EP1180728A2 (en) * | 2000-08-14 | 2002-02-20 | Fuji Photo Film Co., Ltd. | Quality control method for planographic printing plate |
US6352811B1 (en) | 1998-06-23 | 2002-03-05 | Kodak Polychrome Graphics Llc | Thermal digital lithographic printing plate |
WO2002033491A2 (en) * | 2000-10-17 | 2002-04-25 | Kodak Polychrome Graphics Company Ltd. | Aqueous developer for lithographic printing plates |
EP1262318A2 (en) * | 2001-06-01 | 2002-12-04 | Fuji Photo Film Co., Ltd. | Lithographic printing plate precursor |
WO2002096649A1 (en) * | 2001-05-31 | 2002-12-05 | IBF Indústria Brasileira de Filmes Ltda. | Coating composition and method for preparing radiation sensitive plate useful in lithographic printing and the like |
US6534238B1 (en) | 1998-06-23 | 2003-03-18 | Kodak Polychrome Graphics, Llc | Thermal digital lithographic printing plate |
US6699636B2 (en) | 2001-12-12 | 2004-03-02 | Kodak Polychrome Graphics Llc | Imaging element comprising a thermally activated crosslinking agent |
EP1506857A3 (en) * | 1998-06-23 | 2005-03-30 | Kodak Polychrome Graphics LLC | Positive-working thermal imaging element and positive-working lithographic printing plate precursor |
EP1275497A3 (en) * | 2001-06-27 | 2005-09-21 | Fuji Photo Film Co., Ltd. | Planographic printing plate precursor |
USRE41579E1 (en) | 1997-10-17 | 2010-08-24 | Fujifilm Corporation | Positive type photosensitive image-forming material for use with an infrared laser |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1561957A (en) * | 1966-10-24 | 1969-04-04 | ||
GB1155035A (en) * | 1966-06-23 | 1969-06-11 | Agfa Gevaert Nv | Thermographic Recording Process |
GB1154568A (en) * | 1965-11-26 | 1969-06-11 | Agfa Gevaert Nv | Improvements relating to Thermographic Copying. |
GB1160221A (en) * | 1965-05-17 | 1969-08-06 | Agfa Gevaert Nv | Photothermographic Materials and Processes |
GB1208415A (en) * | 1966-10-24 | 1970-10-14 | Agfa Gevaert Nv | Improvements relating to thermo-copying |
GB1245924A (en) * | 1967-09-27 | 1971-09-15 | Agfa Gevaert | Improvements relating to thermo-recording |
EP0573092A1 (en) * | 1992-06-05 | 1993-12-08 | Agfa-Gevaert N.V. | A method for obtaining an image using a heat mode recording material |
US5466557A (en) * | 1994-08-29 | 1995-11-14 | Eastman Kodak Company | Radiation-sensitive composition containing a resole resin, a novolac resin, a latent bronsted acid, an infrared absorber and terephthalaldehyde and use thereof in lithographic printing plates |
US5641608A (en) * | 1995-10-23 | 1997-06-24 | Macdermid, Incorporated | Direct imaging process for forming resist pattern on a surface and use thereof in fabricating printing plates |
EP0823327A2 (en) * | 1996-08-06 | 1998-02-11 | Mitsubishi Chemical Corporation | Positive photosensitive composition, positive photosensitive lithographic printing plate and method for making positive photosensitive lithographic printing plate |
-
1999
- 1999-02-05 EP EP99200336.8A patent/EP0943451B3/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1160221A (en) * | 1965-05-17 | 1969-08-06 | Agfa Gevaert Nv | Photothermographic Materials and Processes |
GB1154568A (en) * | 1965-11-26 | 1969-06-11 | Agfa Gevaert Nv | Improvements relating to Thermographic Copying. |
GB1155035A (en) * | 1966-06-23 | 1969-06-11 | Agfa Gevaert Nv | Thermographic Recording Process |
FR1561957A (en) * | 1966-10-24 | 1969-04-04 | ||
GB1208415A (en) * | 1966-10-24 | 1970-10-14 | Agfa Gevaert Nv | Improvements relating to thermo-copying |
GB1245924A (en) * | 1967-09-27 | 1971-09-15 | Agfa Gevaert | Improvements relating to thermo-recording |
EP0573092A1 (en) * | 1992-06-05 | 1993-12-08 | Agfa-Gevaert N.V. | A method for obtaining an image using a heat mode recording material |
US5466557A (en) * | 1994-08-29 | 1995-11-14 | Eastman Kodak Company | Radiation-sensitive composition containing a resole resin, a novolac resin, a latent bronsted acid, an infrared absorber and terephthalaldehyde and use thereof in lithographic printing plates |
US5641608A (en) * | 1995-10-23 | 1997-06-24 | Macdermid, Incorporated | Direct imaging process for forming resist pattern on a surface and use thereof in fabricating printing plates |
EP0823327A2 (en) * | 1996-08-06 | 1998-02-11 | Mitsubishi Chemical Corporation | Positive photosensitive composition, positive photosensitive lithographic printing plate and method for making positive photosensitive lithographic printing plate |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE41579E1 (en) | 1997-10-17 | 2010-08-24 | Fujifilm Corporation | Positive type photosensitive image-forming material for use with an infrared laser |
US6534238B1 (en) | 1998-06-23 | 2003-03-18 | Kodak Polychrome Graphics, Llc | Thermal digital lithographic printing plate |
EP1506856A3 (en) * | 1998-06-23 | 2005-03-30 | Kodak Polychrome Graphics LLC | Positive-working thermal imaging element and positive-working lithographic printing plate precursor |
EP1506857A3 (en) * | 1998-06-23 | 2005-03-30 | Kodak Polychrome Graphics LLC | Positive-working thermal imaging element and positive-working lithographic printing plate precursor |
US6352811B1 (en) | 1998-06-23 | 2002-03-05 | Kodak Polychrome Graphics Llc | Thermal digital lithographic printing plate |
US6637334B2 (en) | 2000-04-07 | 2003-10-28 | Fuji Photo Film Co., Ltd. | Heat-sensitive lithographic printing plate precursor |
EP1142707A1 (en) * | 2000-04-07 | 2001-10-10 | Fuji Photo Film Co., Ltd. | Heat-sensitive lithographic printing plate precursor |
EP1156371A2 (en) * | 2000-05-15 | 2001-11-21 | Fuji Photo Film Co., Ltd. | Replenishing method of planographic printing plate developer |
EP1156371A3 (en) * | 2000-05-15 | 2002-12-11 | Fuji Photo Film Co., Ltd. | Replenishing method of planographic printing plate developer |
EP1162063A2 (en) | 2000-06-05 | 2001-12-12 | Fuji Photo Film Co., Ltd. | Planographic printing plate precursor |
EP1162063A3 (en) * | 2000-06-05 | 2003-11-05 | Fuji Photo Film Co., Ltd. | Planographic printing plate precursor |
US6649324B1 (en) | 2000-08-14 | 2003-11-18 | Kodak Polychrome Graphics Llc | Aqueous developer for lithographic printing plates |
EP1180728A3 (en) * | 2000-08-14 | 2004-06-30 | Fuji Photo Film Co., Ltd. | Quality control method for planographic printing plate |
EP1180728A2 (en) * | 2000-08-14 | 2002-02-20 | Fuji Photo Film Co., Ltd. | Quality control method for planographic printing plate |
WO2002033491A2 (en) * | 2000-10-17 | 2002-04-25 | Kodak Polychrome Graphics Company Ltd. | Aqueous developer for lithographic printing plates |
WO2002033491A3 (en) * | 2000-10-17 | 2002-08-01 | Kodak Polychrome Graphics Co | Aqueous developer for lithographic printing plates |
WO2002096649A1 (en) * | 2001-05-31 | 2002-12-05 | IBF Indústria Brasileira de Filmes Ltda. | Coating composition and method for preparing radiation sensitive plate useful in lithographic printing and the like |
US7029824B2 (en) | 2001-05-31 | 2006-04-18 | Ibf Industria Brasileira De Filmes Ltda. | Positive working thermal imaging assembly or structure, method for the manufacture thereof and products used as lithographic printing plates and the like |
EP1262318A3 (en) * | 2001-06-01 | 2003-01-15 | Fuji Photo Film Co., Ltd. | Lithographic printing plate precursor |
EP1262318A2 (en) * | 2001-06-01 | 2002-12-04 | Fuji Photo Film Co., Ltd. | Lithographic printing plate precursor |
EP1275497A3 (en) * | 2001-06-27 | 2005-09-21 | Fuji Photo Film Co., Ltd. | Planographic printing plate precursor |
US7258961B2 (en) | 2001-06-27 | 2007-08-21 | Fujifilm Corporation | Planorgraphic printing plate precursor |
US7341815B2 (en) | 2001-06-27 | 2008-03-11 | Fujifilm Corporation | Planographic printing plate precursor |
US6699636B2 (en) | 2001-12-12 | 2004-03-02 | Kodak Polychrome Graphics Llc | Imaging element comprising a thermally activated crosslinking agent |
Also Published As
Publication number | Publication date |
---|---|
EP0943451B1 (en) | 2002-06-05 |
EP0943451B3 (en) | 2018-12-12 |
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