JP2001075269A - Method for plate-making of planographic plate, and automatic devdeloping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for the plate-making of a planographic plate and an automatic developing machine having no possibility of the occurrence of loss caused by inadequately set temperature conditions and a fact that the set temperature condition is wrong due to an operation error, etc., and capable of improving the processing efficiency. SOLUTION: The setter control part 18 of a plate setter 14 extracts area distribution (or area distribution of non-image part) of an image forming area as area distribution information from the image data part of a TIFF file inputted from a work station part 12 by using an area distribution extracting program and outputs it to a PS plate processor 16 on-line. The processor 16 controls the distribution of heating before development on the basis of the area distribution information inputted from the plate setter 14 on-line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for making a lithographic printing plate and an automatic developing machine, and more particularly to a method for making a lithographic printing plate having a photopolymerizable photosensitive layer and an automatic developing machine.

[0002]

2. Description of the Related Art In general, a photosensitive lithographic printing plate (hereinafter referred to as "PS
Plate) is a photosensitive lithographic printing plate processing apparatus (hereinafter referred to as “P”).
S "processor").
The development processing in this PS plate processor was carried out by transporting the PS plate on which the image was recorded into the developing tank, immersing it in the developing solution stored in the developing tank while transporting it in the developing tank, and providing the PS plate in the developing solution. This is performed by removing the photosensitive layer in the non-image portion of the PS plate using a rubbing means such as a rotating brush roller.
In this PS plate processor, the PS plate that has been processed with the developing solution is washed with washing water in a washing section (washing treatment), and then subjected to a desensitizing process by applying a gum solution in a desensitizing section. Is performed, processing such as plate surface protection is continuously performed.

Generally, a diazo resin, a photocrosslinking type, or a photopolymerization type is used as a photosensitive layer of a PS plate. Since the photopolymerizable photosensitive layer is radical polymerization, the reaction tends to proceed due to radicals present in the photosensitive layer even after the exposure is completed. As a result, the reaction becomes uneven due to the atmosphere and time difference after exposure, and the printing durability of the photosensitive layer and the size of the halftone dots forming the image formed on the PS plate are changed, and the obtained image quality is deteriorated. Has been a problem.

[0004] Therefore, before the development of the PS plate, the PS plate is heated by a heating device (preheating) to make the surface temperature of the PS plate uniform, thereby preventing the reaction from becoming uneven.
It has been proposed to make the image quality constant.

[0005]

However, if the set temperature conditions are inappropriate or the set temperature conditions are different due to an operation error or the like, a plate having a desired image quality cannot be obtained. There is a problem that a large loss must be re-started. In addition, since the heating conditions are generally manually input by the user into the PS plate processor, it is difficult to provide appropriate heating conditions to the exposure area, and operation errors such as forgetting to change or inputting errors may occur. Is inevitable.

Further, in recent years, the demand for energy saving has been increasing, and reducing the running cost of the apparatus has become an important issue.

In view of the above, according to the present invention, there is no possibility that the set temperature condition is inappropriate, or there is no risk of a loss due to a difference in the set temperature condition due to an operation error or the like, and the processing efficiency of the lithographic printing plate can be improved. It is an object to obtain a plate making method and an automatic developing machine.

[0008]

To achieve the above object, a method of making a lithographic printing plate according to the first aspect of the present invention comprises the following steps (1) to (4). (1) a step of exposing a lithographic printing plate having a photopolymerizable photosensitive layer based on image data to form an exposed image; (2) Before the step (1),
Alternatively, a step of obtaining area distribution information of an image area of the exposed image from the image data, and determining a heating distribution based on the area distribution information. (3) a step of heating the lithographic printing plate on which the exposure image is formed with the heating distribution determined in the step (2) after the steps (1) and (2). (4) A step of developing the lithographic printing plate after the step (3).

That is, in the method of making a lithographic printing plate according to the first aspect of the present invention, the pretreatment before developing the lithographic printing plate having the photopolymerizable photosensitive layer exposed in the step (1) is as follows: Before or after the step 1), a heating distribution is determined based on the area distribution information of the image forming area formed on the lithographic printing plate (step (2)), and the determined heating distribution is determined by the lithographic printing plate. Is heated (step (3)), and then developed (step (4)).

That is, the portion where no image is formed is not exposed, and hence no photopolymerization reaction occurs.
There is no need for heating. Therefore, in the lithographic printing plate making method according to the first aspect, the portion that does not need to be heated is not heated based on the area distribution information of the image forming region, and the image forming region that needs to be heated (that is, the exposure region) The heating distribution to be applied to the photosensitive lithographic printing plate is controlled so as to focus on heating.

[0011] This makes it possible to make the reactions of the exposed areas, which are the image forming areas, uniform, so that the image quality is not degraded and that the unexposed parts other than the image forming areas are not heated. In this way, heat treatment can be performed under appropriate conditions in accordance with the shape of the formed image, and heating is necessary because heating is performed so that unexposed parts other than the image forming area are not heated. Energy can be suppressed lower than in the case where the entire surface is uniformly heated.

According to a second aspect of the present invention, there is provided an automatic developing apparatus suitable for the method for making a lithographic printing plate according to the first aspect, wherein the lithographic printing plate has a photopolymerizable photosensitive layer and has been exposed. Before performing development of the printing plate, heating means for heating the lithographic printing plate, and when heating the exposed lithographic printing plate having the photopolymerizable photosensitive layer by the heating means, the lithographic printing plate, Heating control means for controlling a heating distribution applied to the planographic printing plate based on area distribution information of the formed image forming area.

In other words, in the invention according to claim 2, the heating control means of the automatic developing machine determines the heating distribution given to the photosensitive lithographic printing plate based on the area distribution information of the image forming area formed on the photosensitive lithographic printing plate. Because of the control, an appropriate temperature condition can be set for the actually formed image forming area, and the heat treatment can be performed without an operation error such as forgetting to change or input error. .

That is, when a photosensitive lithographic printing plate having a photopolymerizable photosensitive layer is used, since the photopolymerization reaction is not completely terminated in the exposed area, the heating control means of the automatic developing machine is used in the present invention. The distribution of heating applied to the photosensitive lithographic printing plate is controlled so that at least the exposed area serving as an image forming area is sufficiently heated.

As a method of controlling the heating distribution applied to the photosensitive lithographic printing plate, for example, by turning on / off the driving of the heating means or changing the driving power value of the heating means, the transport of the photosensitive lithographic printing plate is performed. The heating distribution can be changed in the direction along the direction, and a shutter mechanism composed of a heat insulating member is provided between the heating means and the photosensitive lithographic printing plate, and by opening and closing this shutter mechanism, at least the photosensitive It is possible to change one of the heating distributions in a direction orthogonal to the way of transporting the photosensitive lithographic printing plate and in a direction along the way of transporting the photosensitive lithographic printing plate.

When the heating distribution is changed by switching on / off of the driving of the heating means or by changing the driving power value of the heating means, the power consumption of the apparatus can be suppressed, so that the running cost of the apparatus is reduced. There is an advantage that energy can be saved.

Even when the heating conditions are changed, the heating control means of the automatic developing machine controls the heating distribution applied to the lithographic printing plate based on the area distribution information of the image forming area formed on the photosensitive lithographic printing plate. Therefore, the time required for the temperature in the heating device to reach an appropriate temperature can be reduced as compared with a case where the temperature is manually changed, and the processing efficiency can be improved.

[0018] Such control of the heating distribution is carried out by, before the development of the exposed lithographic printing plate having a photopolymerizable photosensitive layer, the area distribution information of the image forming area of the image formed on the lithographic printing plate. The heating distribution may be determined based on the heating distribution based on a program for heating the lithographic printing plate so that the determined heating distribution is given to the lithographic printing plate. This program may be recorded in advance on a recording medium of the automatic developing machine, or may be stored on a recording medium separate from the automatic developing machine and installed from the recording medium.

The area distribution information of the image forming area for controlling the heating distribution may be obtained or input on-line or off-line from a device provided before the heating means for heating the lithographic printing plate. Alternatively, it is possible to use a value calculated from image data obtained or input online or offline from a device provided in a stage preceding the heating means for heating the lithographic printing plate.

Further, as a lithographic printing plate having a photopolymerizable photosensitive layer used in the present invention, a photopolymerizable photosensitive layer and a protective layer for protecting the photosensitive layer are sequentially laminated on a support. Photosensitive lithographic printing plates are preferred.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment,
As shown in FIG. 1, a personal computer 10, a workstation 1
2. A case where the present invention is applied to a plate making system including a plate setter (exposure device) 14 and a PS plate processor (automatic developing device) 16 will be described.

In the PS plate used in the present embodiment, an organic undercoat layer, a photopolymerizable photosensitive layer, and an overcoat layer are sequentially provided on the surface of an aluminum support having a back coat layer on the back surface. It can be of a configuration. The details of the PS plate will be described later.

The plate making system according to the present embodiment comprises a personal computer 10, a work station 12, a plate setter 1
4 and the PS plate processor 16 are all connected online, and the image data and P
Various setting information such as the type (plate type), plate thickness, and plate size of the S plate can be output to the PS plate processor 16 online.

The personal computer 10 includes an application for editing an image read from an image reading means such as a scanner while displaying the image on a display, creating characters and images on the display, and creating an image to be printed. Is installed.

This application outputs an image created by a user to the workstation 12 as vector-format image data such as an outline, a drawing command for designating an area ratio of a filled area, a transmittance of a filled area, and the like. I do. Further, various setting information such as the type, thickness, and size of the PS plate to be exposed, which is input by the user from the keyboard at the same time as the creation of the image, as text data together with the vector format image data. Output to the workstation 12.

The workstation 12 has a raster image processor (hereinafter referred to as RIP) and driver software for the platesetter 14 installed therein.

The RIP interprets vector-format image data and develops it as a row of dots having gradations.
FF format file (hereinafter referred to as TIFF file)
In this embodiment, the image data is converted from a vector format image data into a TIFF file including a tag format header portion and an image data portion.

The driver software of the plate setter 14 stores various setting information such as a TIFF file and a plate type, a plate thickness, and a plate size in a text format.
4 is software that converts the image data into an image format that can be analyzed in step 4 and outputs it to the platesetter 14.

Therefore, the workstation 12 converts the vector-format image data such as the drawing command input from the personal computer 10 into a TIFF file, and then sets various settings such as the TIFF file, plate type, plate thickness, and plate size. After converting the information into an image format that can be analyzed by the plate setter 14 driver software, the plate setter 14
Output to

The plate setter 14 includes a ROM and a RAM.
And a setter control section 18 composed of a CPU.
Various programs for controlling the plate setter 14 are stored in the ROM, and a TIFF in an image format that can be analyzed by the plate setter 14 is stored in the RAM.
The file and various setting information are temporarily stored.

The CPU calls various programs from the ROM and reads T from the RAM based on the programs.
Based on the IFF file and various setting information, for example, a control signal for controlling the transport speed of a transport unit (not shown) of the plate setter 14, an on / off drive signal of a laser light source (not shown), and adjustment of light amount And various control signals such as a laser drive signal for performing the control, and drive control of the platesetter 14 by the various control signals. As a result, the plate setter 14 performs the exposure processing of the PS plate 110 under optimal conditions according to the image selected on the personal computer 10. In addition, since the exposure processing of the plate setter 14 is publicly known, detailed description is omitted here.

Further, in the ROM of the setter controller 18, an area distribution extraction program for extracting the area distribution of the image forming area (or the area distribution of the non-image area) from the image data section included in the TIFF file as area distribution information. The CPU calls the area distribution extraction program from the ROM, and reads the area distribution of the image forming area (or the area distribution of the non-image area) from the image data portion of the TIFF file read from the RAM based on the area distribution extraction program. ) Is extracted as area distribution information and output to the PS plate processor 16 together with various setting information.

As shown in FIG. 2, the PS plate processor 16 is roughly divided into a heating unit 20, a first washing unit 22, a developing unit 24, a second washing unit 26, a finisher unit 28, a drying unit 29, and a processor control unit. The PS plate is heated from the heating unit 20 to the first rinsing unit 22, the developing unit 24, the second rinsing unit 26, the finisher unit 28, and the drying unit 29 in this order by a transport mechanism composed of a plurality of pairs of transport rollers. It is a configuration to be transported.

The heating unit 20 rotates the PS plate 1 while holding the PS plate between a pair of rollers, thereby rotating the exposed PS plate 1.
An image forming area in the photopolymerizable photosensitive layer of the PS plate 110 is constituted by a pair of draw-in rollers 31 for pulling the PS plate 10 into the interior of the PS plate processor 16 and a heating device 32. (I.e., accelerate the curing of the exposed areas).

The heating device 32 includes a PS plate front end detection sensor 3
3, heating means 34, PS plate 11 on the lower side of PS plate 110
0, a plurality of transport rollers 36, a heating control unit 38,
And a shutter mechanism 40.

As shown in FIG. 3, the heating means 34 comprises a far-infrared heater 42 for emitting far-infrared rays, and an umbrella-shaped reflector 44 for covering the far-infrared heater 42. The far-infrared heater 42 is turned on and off and the driving voltage is controlled by a heating control unit 38 described later, and is applied to the surface of the PS plate 110 passing through the lower irradiation area by on-off switching and the driving voltage control of the far-infrared heater 42. It is configured so that the amount of heat can be partially changed.

As such a far infrared heater 42,
For example, a halogen lamp heater whose surface is black-coated with ceramic can be used. In the present embodiment, as an example, the heater output is set to a maximum output of 600 W and a standard voltage of 200 V. However,
The drive voltage is controlled by a heating control unit 38 described later in accordance with the area distribution of the image forming area. The driving voltage value of the far-infrared heater 42 is, for example, as disclosed in
-286389.

Further, a shutter mechanism 40 is provided between the heating means 34 and the PS plate 110. As shown in FIG. 3, the shutter mechanism 40 includes first and second two shutters.
It is composed of two heat insulating plates 46a, 46b and moving mechanisms 48a, 48b provided on each of the two heat insulating plates. These first heat insulating plate 46a and second heat insulating plate 46
b is a length that can independently cover the entire width of the PS plate 110 and block heat from the upper heating means 34.

A rack 50a is provided on the side of the first heat insulating plate 46a on the side opposite to the transport path of the PS plate 110, and a pinion 52a meshes with the rack 50a.
The pinion 52a is rotated by the drive of the motor 54a to move the rack 50a in a direction orthogonal to the transport direction of the PS plate 110.

The motor 54a is connected to a heating control unit 38 described later.
The driving is controlled such that the first heat insulating plate 46a moves by a distance based on the area distribution information of the image forming area. Since the moving mechanism 48b of the second heat insulating plate 46b has the same configuration, the description is omitted.

The drive of the shutter mechanism 40 is controlled by a heating control unit 38 described later. The details will be described later. Further, the configuration of the shutter mechanism 40 is not limited to this configuration. For example, a motor and a gear, a cam,
A driving mechanism such as a combination mechanism with a link or the like, or a plunger solenoid or the like can be applied. In short, the far infrared rays from the heating means 34 are cut off, and the irradiation amount of the far infrared rays given to the PS plate 110 is controlled. Anything can be obtained.

The heating control unit 38 includes a RAM, a ROM, and a C
A detection result from the PS plate front end detection sensor 33, area distribution information input from the plate setter 14, and various setting information are input.

The RAM stores area distribution information and various setting information input from the plate setter 14. R
The OM calculates the area distribution of the image forming area based on the area distribution information, calculates the distribution of the heating area to be heated from the area distribution of the image forming area, and then detects the PS plate tip detection sensor 3.
3 tip detection result, distribution of heating area, and PS plate 110
Calculates the time and moving distance until the start of the movement of each of the first heat insulating plate 46a and the second heat insulating plate 46b based on the transfer speed, and drives and controls the motor based on the time and the moving distance until the start of the movement. , PS plate tip detection sensor 33
, The distribution of the heating area, the transport speed of the PS plate 110, and the thickness of the PS plate 110 included in various setting information
A program for controlling the driving of the far infrared heater 42 based on (plate thickness) is stored.

The ROM stores a table of driving voltages corresponding to the thickness of the PS plate. The driving voltage is 98 V when a halogen lamp heater is used, for example, when the thickness of the PS plate aluminum substrate is 0.15 mm,
137V for 0.24mm, 165 for 0.3mm
V, which is 200 V in the case of 0.4 mm, and is controlled to increase as the thickness of the aluminum substrate increases.

Here, the heating distribution control executed by the CPU of the heating control unit 38 will be described with reference to the flowchart of FIG. In step 200, first, R
The area distribution information and various setting information stored in the AM are read.

In the next step 202, the area distribution of the image forming area is calculated from the area distribution information. In step 204, the distribution of the heating area to be heated is calculated from the obtained area distribution of the image forming area. .

In the next step 205, the PS plate 11 to be processed included in the various setting information read from the RAM
A driving voltage determined according to the thickness of 0 (plate thickness) is read from the ROM table, and a driving voltage lower than the read driving voltage is supplied to the far-infrared heater 42 for energy saving.

In the next step 206, based on the detection result of the leading edge of the PS plate leading edge detection sensor 33, the transport speed of the PS plate, and the distribution of the heating area, the leading edge of the PS plate 110 is detected and then intersects the transport direction. Calculate the time until the first edge of the heating target area along the direction reaches directly below the far-infrared heater 42, and determine whether the time when the first edge of the heating target area reaches directly below the far-infrared heater 42 is reached. Judge.

In step 206, when it is determined that the time has come, the process proceeds to the next step 208, in which the drive voltage determined according to the thickness (plate thickness) of the PS plate 110 read from the ROM is set. Control is performed so as to be supplied to the far-infrared heater 42, and the process proceeds to the next step 210, in which the motors 54a and 54b of the first heat insulating plate 46a and the second heat insulating plate 46b are controlled according to the distribution of the heating area. To cover the non-heating target area. This motor 54
The non-heating target area immediately below the far-infrared heater 42 to which the driving voltage determined according to the thickness (plate thickness) is supplied by the driving of the a and 54b is controlled so that the heating target area is heated. Is done.

In the next step 212, it is determined whether or not the time has elapsed since the end of the PS plate 110 was detected and the last edge of the heating target area along the direction intersecting with the transport direction arrives immediately below the far-infrared heater 42. Judge.

If it is determined in step 212 that the time for the last edge to reach immediately below the far-infrared heater 42 has not elapsed, the process returns to step 210 so that only the heating target area is heated. The movement control of the first heat insulating plate 46a and the second heat insulating plate 46b according to the above is continued.

If it is determined in step 212 that the time for the last edge to reach immediately below the far-infrared heater 42 has elapsed, there is no area to be heated downstream of the last edge. Then, a drive voltage lower than the drive voltage determined according to the thickness (plate thickness) of the PS plate 110 is supplied to the far-infrared heater 42 for energy saving.

In the next step 216, it is determined whether or not all the heating processes have been completed. If it is determined that all the heating processes have not been completed, the process returns to step 200 and the above-described process is repeated for the next heating target area. When it is determined that the processing has been completed, the present routine ends.

The above-described heating control will be described by taking as an example a case where the image forming area 102a is formed at a position slightly deviated to one side from the center of the PS plate 110 as shown in FIG. . P by the PS plate tip detection sensor 33
When the edge of the O-line position, which is the first edge of the image forming area 102a to be heated, reaches the position immediately below the far-infrared heater 42 after the leading end of the S plate 110 is detected, the first The motors 54a and 54b are driven such that the heat insulating plate 46a is disposed at a distance A and the second heat insulating plate 46b is positioned at a distance B from the edge side of the PS plate 110 toward the center. .

Thereafter, after the leading edge of the PS plate 110 is detected by the PS plate leading edge detection sensor 33, the time when the edge of the next line, the P-line position, reaches the position immediately below the far infrared heater 42 has elapsed. Since the edge at this P-line position is the last edge of the image forming area 102a,
The heat insulating plate 46a and the second heat insulating plate 46b are retracted, and the drive voltage value of the far infrared heater 42 is controlled to be low.

As another example, a case where the image forming area 102b is formed in the shape shown in FIG. 5B will be described. PS plate 1 by PS plate tip detection sensor 33
When the time at which the edge of the Q-ray position, which is the first edge of the image forming area 102b to be heated, reaches the position immediately below the far-infrared heater 42 after the detection of the front end of the image forming area 102, the image forming here is performed. Area 102b is PS version 1
10, the first heat insulating plate 46a and the second heat insulating plate 46a.
The moving distance of each of the heat insulating plates 46b is 0, and the first heat insulating plate 46a and the second heat insulating plate 46b are controlled to be retracted.

Thereafter, when the leading edge of the PS plate 110 is detected by the leading edge detection sensor 33 of the PS plate 110 and the next edge, ie, the edge of the R-line position, reaches the position immediately below the far-infrared heater 42, this time is reached. Since the edge at the R-line position is not the last edge, the first heat insulating plate 46a has a distance C
And the second heat insulating plate 46b has a distance D and the PS plate 1 respectively.
The motors 54a and 54b are driven so as to be arranged at positions where they enter the direction from the edge side portion toward the center of the motor 10.

Thereafter, after the leading edge of the PS plate 110 is detected by the leading edge detection sensor 33 of the PS plate, the edge of the S line position, which is the next edge after the edge of the R line position, reaches the position immediately below the far infrared heater 42. At this time, since the edge at the S-line position is the last edge, the first heat insulating plate 46a and the second heat insulating plate 46b are retracted, and the drive voltage value of the far-infrared heater 42 is reduced. Is done.

When the region to be heated is not heated, the power consumption can be reduced by lowering the driving voltage value of the far-infrared heater 42 below the driving voltage value corresponding to the plate thickness. can do. The same effect can be obtained by turning off the far infrared heater 42 instead of lowering the drive voltage value of the far infrared heater 42.

When the far-infrared heater 42 is turned on, the entire area of the PS plate 110 is covered by both or one of the first heat-insulating plate 46a and the second heat-insulating plate 46b. May not reach.

The heating means of the present embodiment calculates the area distribution of the image forming area based on the area distribution information input from the platesetter 14, determines the heating distribution from the obtained area distribution, Since the amount of heat applied to the surface of the object is changed according to the heating distribution, the user does not need to input area distribution information. Therefore, it is possible to avoid the occurrence of a loss due to an operation error or the like, and to improve the processing efficiency from the exposure processing to the development processing.

In addition, since only the necessary portions need to be sufficiently heated, the drive voltage value of the far-infrared heater 42 may be controlled to be low when the area immediately below the far-infrared heater 42 is a non-heating target area. , Can be controlled, so that the image quality is not reduced, the power consumption of the apparatus is reduced, the running cost is reduced, and the energy can be saved.

The PS plate 110 in which the image forming area (ie, the exposure section) has been heated in the heating section 20 as described above is conveyed to the first washing section 22 provided at the subsequent stage.

As shown in FIG. 2, the first washing section 22 includes a pair of drawing rollers 62 and a first washing water supply nozzle in the first washing layer 60 in order from the upstream side along the transport direction of the PS plate 110 in the first washing layer 60. 64b, a first rotating brush roller 66 and a backup roller 67, a second cleaning water supply nozzle 64b, and a pair of delivery rollers 68. The overcoat layer formed on the outermost surface of the PS plate 110 is removed by washing with water before development. I do.

Further, a first overflow pipe 61 is provided in the first washing layer 60, and when the liquid level of the washing water accumulated in the first washing layer 60 exceeds a predetermined level, the first flushing water is discharged. It is adjusted so that it flows into the overflow pipe 61 and is guided to the washing water tank 63 so that a constant amount of washing water is always held in the first washing layer 60.

The cleaning water tank 63 is provided with a pump P. The cleaning water is pumped up by the pump P and the first cleaning water supply nozzle 64a and the second cleaning water supply nozzle 6 are pumped.
4b.

The first rinsing section 2 is driven by the pull-in roller pair 62.
The heated PS plate 110 drawn into 2 is sandwiched between the first first rotating brush roller 66 and the backup roller 67 with the cleaning water supplied to the surface by the first cleaning water supply nozzle 64a. When transported, the surface is polished by the first rotating brush roller 66, and the uppermost overcoat layer of the PS plate 110 is removed.

A second stage is provided after the first rotating brush roller 66.
A cleaning water supply nozzle 64b is provided, and the cleaning water supplied from the second cleaning water supply nozzle 64b to the surface of the PS plate 110 is removed by the first rotating brush roller 66 attached to the surface of the PS plate 110. The residue of the overcoat layer is removed. Thereby, the overcoat layer is removed from the surface of the PS plate 110, and the PS plate 110
The toner is sent out to the developing unit 24 provided at the subsequent stage of the first washing unit 22 by the sending roller pair 68.

As shown in FIG. 2, the developing section 24 includes, in the developing tank 70, a drawing roller pair 72, a developer injection nozzle 74,
Dilution water injection nozzle 76, first spray pipe 78, first
Rotating brush roller 71a, second rotating brush roller 71b
And a delivery roller pair 75, and performs development processing by immersing the PS plate 110 in a developer.

The pull-in roller pair 72 is connected to the first washing section 22.
Is drawn into the developing unit 24 at an angle in the range of about 15 ° to 31 ° with respect to the horizontal direction. The developing solution spray nozzle 74 injects the developing solution pumped up from the developing solution storage layer 82 by the pump P into the developing layer. This pump P is connected to the processor control unit 30.
The driving is controlled by. Similarly, the dilution water injection nozzle 76 injects the dilution water pumped up from the water storage layer 84 by the pump P into the development layer. The drive of the pump P is also controlled by the processor control unit 30.

The processor control unit 30 controls the amount of the developer and the amount of the dilution water to be supplied according to the area ratio of the image forming area. In other words, the larger the developing area, the faster the deterioration of the developing solution. Therefore, the dilution water is reduced and the developing solution is supplied so as to increase, and the smaller the developing area, the slower the deterioration of the developing solution. The concentration of the developing solution is adjusted by reducing the dilution water and supplying the developing solution so as to increase.

A second overflow pipe 79 for collecting the developing solution overflowing from the developing tank 70 is provided in the developing tank 70 so that the liquid level of the developing solution accumulated in the developing tank 70 is maintained at a predetermined level. Is exceeded, the developer flows into the second overflow pipe 79 and the waste liquid tank 8
The developing tank 70 is adjusted so that a constant amount of the developing solution is always held in the developing tank 70.

The developer used in the present invention contains the following components.

(Alkali agent) The developing solution and the developing replenisher used in the developing method of the present invention have a pH of 9.0 to 13.5.
More preferably, it is an alkaline aqueous solution of 10.0 to 13.3.

As such a developing solution and a developing replenishing solution, conventionally known aqueous alkaline solutions can be used. For example, sodium silicate, potassium, tribasic sodium, potassium, ammonium, dibasic sodium phosphate, potassium, ammonium, sodium bicarbonate, potassium, ammonium, sodium carbonate, potassium, potassium Inorganic alkaline agents such as ammonium, sodium bicarbonate, potassium, ammonium, sodium borate, potassium, ammonium, sodium hydroxide, ammonium, potassium, and lithium. Also, monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, monoisopropylamine, diisopropylamine, triisopropylamine, n-butylamine, monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, Organic alkali agents such as ethyleneimine, ethylenediamine and pyridine are also used.

Among these alkaline agents, preferred are aqueous silicate solutions such as sodium silicate and potassium silicate. The reason is that silicon oxide Si
The ratio of O ₂ to alkali metal oxide M ₂ O (generally [SiO 2
₂ ] / [M ₂ O] molar ratio) and the concentration allow adjustment of pH and developability. For example, Si
When the molar ratio of O ₂ / Na ₂ O is 1.0 to 1.5 (that is, [Si
O ₂ ] / [Na ₂ O] is 1.0 to 1.5), and Si
An alkali metal silicate composed of an aqueous solution of sodium silicate having an O ₂ content of 1 to 4% by weight is suitably used in the present invention.

Still another preferred alkaline agent is a buffer solution comprising a weak acid and a strong base. Weak acids used as such buffers include an acid dissociation constant (pKa) of 1
Those having a pKa of from 10.0 to 13.3 are preferred, and those having a pKa of from 11.0 to 13.1 are particularly preferred. For example, in the case of sulfosalicylic acid, the third dissociation constant is 11.7,
It can be suitably used in the present invention. That is, in the case of a polybasic acid, it can be used in the present invention if at least one acid dissociation constant is within the above range.

[0078] Such weak acids include Pergamo.
IONISATION CO issued by nPress
NSTANS OF ORGANIC ACIDS
Selected from those described in INAQUEOSUS SOLUTION and the like, for example, 2,2,3,3-tetrafluoropropanol-1 (pKa 12.74), trifluoroethanol (12.37), trichloroethanol (12 .24), pyridine-2-aldehyde (12.68), pyridine-4-
Aldehydes such as aldehyde (12.5), sorbitol (13.0), saccharose (12.7),
2-deoxyribose (12.61), 2-deoxyglucose (12.51), glucose (12.4)
6), galactose (12.35), arabinose (12.34), xylose (12.29), fructose (12.27), ribose (12.22), mannose (12.08) , L-ascorbic acid (1)
Saccharides such as 1.34), salicylic acid (13.0), 3-
Hydroxy-2-naphthoic acid (12.84), catechol (12.6), gallic acid (12.4), sulfosalicylic acid (11.7), 3,4-dihydroxysulfonic acid (12.84) 2), 3,4-dihydroxybenzoic acid (11.94), 1,2,4-trihydroxybenzene (11.82), hydroquinone (11.56), pyrogallol (11.34) and resorcinol Compounds having a phenolic hydroxyl group such as (11.27), 2-butanone oxime (12.45), acetoxime (12.42), 1,2-cycloheptanediondioxime (12.3), 2-hydroxybenzaldehyde oxime (12.10), dimethylglyoxime (11.9), ethanediamide dioxime (11.1)
37), oximes such as acetophenone oxime (11.35), 2-quinolone (11.76), 2-pyridone (11.65) and 4-quinolone (11.2)
8), 4-pyridone (11.12), 5-aminovaleric acid (10.77), 2-mercaptoquinoline (10.77)
25), amino acids such as 3-aminopropionic acid (10.24), fluorouracil (13.0), guanosine (12.6), uridine (12.6), adenosine (12.56) , Inosine (12.5), guanine (12.3), citidine (12.2), cytosine (12.2), hypoxanthine (12.1), xanthine (11.9), etc. In addition, diethylaminomethylphosphonic acid (12.32), 1-amino-3,3,3-trifluorobenzoic acid (12.2)
9), isopropylidene diphosphonic acid (12.1)
0), 1,1, -ethylidene diphosphonic acid (11.5)
4), 1-hydroxy 1,1-ethylidene diphosphonic acid (11.52) and benzimidazole (12.8).
6), thiobenzamide (12.8), picoline thioamide (12.55), barbituric acid (12.5) and the like.

As the strong base to be combined with these weak acids, sodium hydroxide, ammonium hydroxide, potassium and lithium are used.

These alkaline agents may be used alone or in combination of two or more.

Preferred among these alkaline buffers are those obtained by combining sulfosalicylic acid, salicylic acid, saccharose and sorbitol with sodium hydroxide and potassium hydroxide. Among them, a preferred combination is sorbitol and potassium hydroxide or sodium hydroxide.

The above-mentioned various alkaline agents are used by adjusting the pH within a preferred range depending on the concentration and combination.

(Surfactant) The developing solution and the replenisher used in the present invention may contain various surfactants, if necessary, for the purpose of accelerating the developing property, dispersing the developing scum and improving the ink affinity of the printing plate image area. Agents and organic solvents can be added. Preferred surfactants include anionic, cationic, nonionic and amphoteric surfactants.

Preferred examples of the surfactant include polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene polystyryl phenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, and glycerin fatty acid partial esters. , Sorbitan fatty acid partial esters,
Pentaerythritol fatty acid partial esters, propylene glycol monofatty acid esters, sucrose fatty acid partial esters, polyoxyethylene sorbitan fatty acid partial esters, polyoxyethylene sorbitol fatty acid partial esters, polyethylene glycol fatty acid esters, polyglycerin fatty acid partial esters , Polyoxyethylenated castor oils, polyoxyethylene glycerin fatty acid partial esters, fatty acid diethanolamides,
Nonionic surfactants such as N, N-bis-2-hydroxyalkylamines, polyoxyethylene alkylamines, triethanolamine fatty acid esters, and trialkylamine oxides, fatty acid salts, abietic acid salts,
Hydroxyalkanesulfonates, alkanesulfonates, dialkylsulfosuccinates, linear alkylbenzenesulfonates, branched alkylbenzenesulfonates, alkylnaphthalenesulfonates, alkylphenoxypolyoxyethylenepropylsulfonates, polyoxy Ethylene alkyl sulfophenyl ether salts, N-methyl-N-oleyltaurine sodium salt, N-alkyl sulfosuccinic acid monoamide disodium salt, petroleum sulfonates, sulfated tallow oil, sulfate salts of fatty acid alkyl esters, alkyl sulfates Salts, polyoxyethylene alkyl ether sulfates, fatty acid monoglyceride sulfates, polyoxyethylene alkyl phenyl ether sulfates, Oxyethylene styryl phenyl ether sulfates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, polyoxyethylene alkyl phenyl ether phosphates, partially saponified styrene / maleic anhydride copolymers, Partially saponified olefin / maleic anhydride copolymers, anionic surfactants such as naphthalene sulfonate formalin condensates, quaternary ammonium salts such as alkylamine salts, tetrabutylammonium bromide, polyoxyethylene alkylamine Salts, cationic surfactants such as polyethylene polyamine derivatives, amphoteric surfactants such as carboxybetaines, aminocarboxylic acids, sulfobetaines, aminosulfates, and imidazolines. . Among the surfactants listed above, those with polyoxyethylene,
It can be read as a polyoxyalkylene such as polyoxymethylene, polyoxypropylene, polyoxybutylene, and their surfactants are also included.

Further preferred surfactants are fluorine-based surfactants containing a perfluoroalkyl group in the molecule. Such fluorosurfactants include perfluoroalkyl carboxylate, perfluoroalkyl sulfonate, anionic type such as perfluoroalkyl phosphate, amphoteric type such as perfluoroalkyl betaine,
Cationic and perfluoroalkylamine oxides such as perfluoroalkyltrimethylammonium salts, perfluoroalkylethylene oxide adducts, oligomers containing perfluoroalkyl and hydrophilic groups,
Non-ionic forms such as oligomers containing perfluoroalkyl groups and lipophilic groups, oligomers containing perfluoroalkyl groups, hydrophilic groups and lipophilic groups, and urethanes containing perfluoroalkyl groups and lipophilic groups.

The above-mentioned surfactants can be used alone or in combination of two or more.
001 to 10% by weight, more preferably 0.01 to 5% by weight.

(Development Stabilizer) Various development stabilizers are used in the developer and replenisher used in the present invention.
Preferred examples thereof include polyethylene glycol adducts of sugar alcohols described in JP-A-6-282079, tetraalkylammonium salts such as tetrabutylammonium hydroxide, phosphonium salts such as tetrabutylphosphonium bromide, and iodonium such as diphenyliodonium chloride. Salts are mentioned as preferred examples.

Further, anionic or amphoteric surfactants described in JP-A-50-51324, water-soluble cationic polymers described in JP-A-55-95946, and JP-A-56-142528 are disclosed. There is a water-soluble amphoteric polyelectrolyte described in the gazette.

Further, an organic boron compound to which an alkylene glycol has been added described in JP-A-59-84241, and a polyoxyethylene / polyoxypropylene block polymerization type water-soluble surfactant described in JP-A-60-111246. Japanese Patent Application Laid-Open No. Sho 60-129750, polyoxyethylene / polyoxypropylene-substituted alkylenediamine compounds, Japanese Patent Application Laid-Open No. Sho 61-215554, polyethylene glycol having a weight average molecular weight of 300 or more, and Japanese Patent Application Laid-Open No. Sho 63-175858. JP-A-2-39157 discloses a fluorine-containing surfactant having a cationic group, a water-soluble ethylene oxide addition compound obtained by adding 4 mol or more of ethylene oxide to an acid or alcohol, and a water-soluble polyalkylene compound. No.

(Organic Solvent) An organic solvent is further added to the developing solution and the developing replenisher, if necessary. As such an organic solvent, those having a solubility in water of about 10% by weight or less are suitable, and preferably selected from those having a solubility of 5% by weight or less. For example, 1-phenylethanol, 2-phenylethanol, 3-phenyl-1-propanol, 4-phenyl-1-butanol, 4-phenyl-2-butanol, 2-phenyl-1-butanol, 2-phenoxyethanol, 2-phenoxyethanol, Benzyloxyethanol, o-methoxybenzyl alcohol, m-methoxybenzyl alcohol, p-methoxybenzyl alcohol, benzyl alcohol, cyclohexanol, 2-methylcyclohexanol, 3-methylcyclohexanol and 4-methylcyclohexanol, N-phenylethanol Examples include amines and N-phenyldiethanolamine. The content of the organic solvent is 0.1 to 5% by weight based on the total weight of the used solution. The amount used is closely related to the amount of surfactant used, and as the amount of organic solvent increases,
Preferably, the amount of surfactant is increased. This is because when the amount of the surfactant is small and the amount of the organic solvent is large, the organic solvent is not completely dissolved, and therefore, it is impossible to expect good developing property.

(Reducing Agent) A reducing agent is further added to the developer and replenisher used in the present invention. This is to prevent stains on the printing plate, and is particularly effective when developing a negative photosensitive lithographic printing plate containing a photosensitive diazonium salt compound. Preferred organic reducing agents include phenolic compounds such as thiosalicylic acid, hydroquinone, methol, methoxyquinone, resorcin, and 2-methylresorcin; and amine compounds such as phenylenediamine and phenylhydrazine. Further preferred inorganic reducing agents include sodium salts, potassium salts, and ammonium salts of inorganic acids such as sulfurous acid, bisulfite, phosphorous acid, bisulfite, diphosphite, thiosulfate and dithionite. Salts and the like can be mentioned. Among these reducing agents, sulfites are particularly excellent in the stain prevention effect. These reducing agents are preferably used in the developer during use,
It is contained in the range of 0.05 to 5% by weight.

(Organic Carboxylic Acid) The developing solution and replenisher used in the present invention may further contain an organic carboxylic acid. Preferred organic carboxylic acids are those having 6 to 2 carbon atoms.
0 aliphatic carboxylic acids and aromatic carboxylic acids.
Specific examples of aliphatic carboxylic acids include caproic acid,
Examples include enanthylic acid, caprylic acid, lauric acid, myristic acid, palmitic acid and stearic acid, and particularly preferred are alkanoic acids having 8 to 12 carbon atoms. Further, unsaturated fatty acids having a double bond in the carbon chain or branched fatty acids may be used.

The aromatic carboxylic acid is a compound in which a benzene ring, a naphthalene ring, an anthracene ring or the like is substituted with a carboxyl group, specifically, o-chlorobenzoic acid,
p-chlorobenzoic acid, o-hydroxybenzoic acid, p-hydroxybenzoic acid, o-aminobenzoic acid, p-aminobenzoic acid, 2,4-dihydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,6- Dihydroxybenzoic acid,
2,3-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, gallic acid, 1-hydroxy-2-naphthoic acid, 3-hydroxy-2-naphthoic acid, 2-hydroxy-1-naphthoic acid, 1-naphthoic acid And 2-naphthoic acid, and hydroxynaphthoic acid is particularly effective.

The aliphatic and aromatic carboxylic acids are preferably used as a sodium salt, a potassium salt or an ammonium salt in order to increase the water solubility. The content of the organic carboxylic acid in the developer used in the present invention is not particularly limited, but if the content is less than 0.1% by weight, the effect is not sufficient.
If it is 0% by weight or more, not only the effect cannot be further improved but also dissolution may be hindered when another additive is used in combination. Therefore, the preferred amount of addition is 0.1 to 10% by weight, more preferably 0.5 to 10% by weight, based on the developer used.
4% by weight.

(Others) The developer and replenisher used in the present invention may further contain an antifoaming agent and a water softener, if necessary. Examples of water softeners include polyphosphoric acid and its sodium, potassium, and ammonium salts, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, hydroxyethylethylenediaminetriacetic acid, nitrilotriacetic acid, 1,2-diaminocyclohexanetetraacetic acid. Aminopolycarboxylic acids such as acetic acid and 1,3-diamino-2-propanoltetraacetic acid and their sodium, potassium and ammonium salts, aminotri (methylenephosphonic acid), ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepenta (methylene Phosphonic acid), triethylenetetraminehexa (methylenephosphonic acid), hydroxyethylethylenediaminetri (methylenephosphonic acid) and 1-hydroxyethane-1,1-diphosphonic acid and their sodium salts, potassium salts and ammonium salts.

The optimum value of such a water softener varies depending on the chelating power, the hardness of the hard water used and the amount of the hard water. 01 to 5% by weight, more preferably 0.01 to 5% by weight
It is in the range of 0.5% by weight. If the added amount is less than this range, the intended purpose is not sufficiently achieved, and if the added amount is larger than this range, an adverse effect on an image portion such as color omission appears.

The remaining component of the developer and replenisher is water, but may further contain various additives known in the art, if necessary.

It is advantageous from the viewpoint of transportation that the developing solution and the replenishing solution used in the present invention are concentrated solutions in which the content of water is smaller than that at the time of use, and are diluted with water at the time of use. The degree of concentration in this case is suitably such that each component does not cause separation or precipitation.

The temperature of the developing solution is preferably from 15 to 40 ° C., more preferably from 20 to 35 ° C. Development time is 5-60
Seconds are preferred, and more preferably 7 to 40 seconds.

A liquid surface cover 73 is disposed on the developer liquid surface of the developing section 24. The liquid surface cover 73 is arranged so that the lower surface is lower than the liquid surface of the developer stored in the developing tank 70. The liquid level cover 73 allows the developing tank 70
The area where the liquid level of the developing solution in the inside comes into contact with air is narrowed, thereby suppressing the deterioration of the developing solution and the evaporation of moisture in the developing solution due to carbon dioxide in the air.

In the developing solution inside the developing tank 70,
A guide plate 77 having a substantially inverted mountain shape is formed on the inner surface of which the bottom center portion projects downward. The guide plate 77 has a configuration in which a plurality of freely rotating rollers (small rollers; not shown) are arranged with their rotating shafts arranged in parallel in a direction orthogonal to the transport direction of the PS plate 110. PS sent
The plate 110 is transported while being guided by rollers. At this time, since the rollers rotate, the PS plate 110 is not damaged by sliding.

A first spray pipe 78 is provided in the developing solution on the way to the lowest position of the guide plate 77. The first spray pipe 78 is composed of a plurality of spray pipes arranged along a direction orthogonal to the transport direction of the PS plate 110, and sprays a developer from each spray pipe onto the surface of the PS plate 110, thereby forming a PS. Edition 11
In addition to promoting the development process of No. 0, it plays a role of circulating the developer in the developing tank 70.

Along the downstream side from the lowest position of the guide plate 77, the first rotating brush roller 71a and the second rotating brush roller 71 are located at positions corresponding to the upper surface of the PS plate 110.
The first rotating brush roller 71a and the second rotating brush roller 71b are driven by driving means (not shown) to rotate in the transport direction of the PS plate 110.

At the final stage position of the developing section 24, there is provided a delivery roller pair 75 in which a holding section is disposed above the liquid level of the developing solution.
, Sandwiches the PS plate 110 conveyed along the guide plate 77 provided in the developing solution and sends it out from the developing unit 24.
At this time, the developer adhering to the surface of the PS plate 110 is squeezed.

That is, the PS plate 110 sent out from the first washing section 22 is supplied to the draw roller pair 72 of the developing section 24.
Is drawn into the developing unit 24 at an angle in the range of about 15 ° to 31 ° with respect to the horizontal direction, and is conveyed along the surface of the guide plate 77 provided in the developing solution. At this time, PS
The plate 110 is immersed in the developing solution, and then the undeveloped portion of the photopolymerizable photosensitive layer is reliably swollen by the developing solution sprayed by the first spray pipe 78 provided on the way to the lowest position of the guide plate 77. (Ie, developed).

When the PS plate 110 moves downstream from the lowest position of the guide plate 77, the first rotating brush roller 71a,
The surface is rubbed in the order of the second rotating brush roller 71b, and the undeveloped portion of the swollen photopolymerizable photosensitive layer is rubbed off. Further, the PS plate 110 is pulled out from the developing solution by being held by the feed roller pair 75 from the final end position of the guide plate 77, and the developing solution attached to the front and back surfaces when being sent to the feed roller pair 75 is squeezed. And the developing unit 24
To the second washing section 26 provided at the subsequent stage.

As shown in FIG. 2, the second washing section 26 includes a second washing tank 90, two pairs of conveying rollers 92 and 94, a second spray pipe 96, and a third spray pipe 98. The PS plate 110 thus washed is washed with washing water to completely remove the developer adhering to the PS plate 110.

The two pairs of transport rollers 92 and 94 are located above the second washing tank 90 and in the PS plate 11 of the second washing section 26.
It is provided at the zero retract position and the feed position. The transport roller pairs 92 and 94 form a transport path for the PS plate 110, rotate by receiving a driving force of a driving unit (not shown), and pinch and transport the PS plate 110 sent from the developing unit 24.

Between the two pairs of transport rollers 92 and 94,
A second spray pipe 96 and a third spray pipe 98 are provided above and below the PS plate 110 conveyance path, respectively.
Are arranged.

The second spray pipe 96 pumps up water from the water storage layer 84 by the pump P, and replenishes the second washing tank 90 with water. The third spray pipe 98
It is constituted by a plurality of spray pipes arranged along a direction orthogonal to the transport direction of the PS plate 110,
By injecting the cleaning water onto the surface of the PS plate 110 in synchronization with the transport of the S plate 110, the cleaning water is jetted across the width of the PS plate 110.

The third spray pipe 98 injects washing water pumped up by a pump P from a storage tank 93 described later toward the surface of the PS plate 110. As a result, the PS plate 110 is washed with water, and the developer is completely removed.

The washing water sprayed from the third spray pipe 98 spreads quickly on the surface of the PS plate 110, and when the PS plate 110 is washed with water, the PS plate 110 is sent out to the finisher section at the subsequent stage by the transport roller 94. At the same time, it is squeezed from the PS plate 110.

The second washing tank 90 is provided with a third overflow pipe 91. The third overflow pipe 91 guides the washing water flowing into the pipe by raising the water level in the second washing tank 90 to the storage tank 93,
The water level in the second washing tank 90 is always kept constant. The storage tank 93 is provided with a pump P, and the stored cleaning water is pumped up by the pump P and supplied to the third spray pipe 98.

That is, P sent from the developing unit 24
The S plate 110 is drawn into the second washing unit 26 by the pair of conveying rollers 92 provided at the position where the second washing unit 26 is drawn in, and passes through the conveying path formed in the upper layer of the second washing tank. 2 spray pipe 96 and third spray pipe 9
8 is washed on both sides by the washing water sprayed from the second washing unit 26, and a pair of transport rollers 94 provided at the delivery position of the second washing unit 26.
The washing water that adheres to the second washing section 26
Sent out from.

A finisher section 28 is provided at a stage subsequent to the second water washing section 26. This finisher section 28
Are a gum solution tank 100 and a gum solution spray nozzle 102 for spraying the gum solution onto the surface of the PS plate 110;
The gum solution is applied to the PS plate 110 after washing with water to desensitize it. The gum solution tank 100 is provided with an overflow pipe similarly to the other tanks, and is adjusted so that the water level in the tank is always kept constant.

The PS plate 1 sent out from the second washing section 26
Reference numeral 10 denotes a gum that is ejected from the gum solution ejecting nozzle 102 to the image forming side of the surface when passing through the finisher unit 28, and then adheres to the conveying roller pair 104 provided at the delivery position of the finisher unit 28. The liquid is squeezed and sent out from the finisher unit 28.

A drying section 29 is provided downstream of the finisher section 28. When the PS plate 110 passes through the drying section 29, the PS plate 110 is dried and discharged to the outside. In addition,
Since a known configuration can be applied to the drying unit 29, the description is omitted here.

The PS plate used in the plate making system of the present embodiment may be any as long as it includes a photopolymerizable photosensitive layer and an overcoat layer (protective layer) for protecting the photosensitive layer.
Preferably, a compound having an addition-polymerizable ethylenic double bond, a photopolymerization initiation system activated by light having a wavelength of 450 nm or more, and a crosslinkable group are provided on a support obtained by subjecting an aluminum plate to a hydrophilic treatment. It is preferable to use a material having a photopolymerizable photosensitive layer containing the polymer having the above.

Hereinafter, a preferred PS plate will be described in detail. [Aluminum Support] First, the aluminum support of the PS plate is a dimensionally stable metal containing aluminum as a main component, and is made of aluminum or an aluminum alloy. In addition to a pure aluminum plate, it is selected from an alloy plate containing aluminum as a main component and containing a trace amount of a different element, or a plastic film or paper on which aluminum (alloy) is laminated or evaporated. Furthermore, Japanese Patent Publication No. 48-18
No. 327, a composite sheet in which an aluminum sheet is bonded on a polyethylene terephthalate film may be used.

In the following description, the above-mentioned substrates made of aluminum or aluminum alloy are collectively used as aluminum substrates. The foreign elements contained in the aluminum alloy include silicon, iron, manganese, copper, magnesium, chromium, zinc, bismuth, nickel and titanium, and the content of the foreign elements in the alloy is 10% by weight or less. In the present invention, a pure aluminum plate is preferable, but completely pure aluminum is difficult to produce due to refining technology, and therefore may contain a slightly different element. As described above, the composition of the aluminum plate applied to the present invention is not specified, and any of conventionally known and used materials such as JIS A 1050 and JISA 110 can be used.
0, JIS A 3103, JIS A 3005, and the like can be used as appropriate.

The thickness of the aluminum substrate used in the present invention is about 0.1 mm to 0.6 mm. This thickness can be appropriately changed according to the size of the printing press, the size of the printing plate, and the user's request. [Hydrophilic treatment] The above-mentioned aluminum substrate is appropriately subjected to a treatment such as graining described later, and then the surface of the substrate is subjected to a hydrophilic treatment with silicate or polyvinylphosphonic acid or the like. The film has a Si or P element content of 2 to
40 mg / m ^2, more preferably from 4 to 30 mg / m ² formed. In addition, the coating amount can be measured by a fluorescent X-ray analysis method.

In the above-mentioned hydrophilization treatment, the alkali metal silicate or polyvinylphosphonic acid is 1 to 30% by weight, preferably 2 to 15% by weight, and the pH at 25 ° C. is 10 to 10% by weight.
The aluminum substrate on which the anodized film is formed is immersed in the aqueous solution of No. 13 at, for example, 15 to 80 ° C. for 0.5 to 120 seconds.

As the alkali metal silicate, sodium silicate, potassium silicate, lithium silicate and the like can be used. Hydroxides used to increase the pH of the aqueous alkali metal silicate solution include sodium hydroxide, potassium hydroxide, and lithium hydroxide.

Incidentally, an alkaline earth metal salt or a Group IVB metal salt may be added to the above-mentioned treatment liquid. Alkaline earth metal salts include nitrates such as calcium nitrate, strolentium nitrate, magnesium nitrate and barium nitrate, and aqueous solutions such as sulfates, hydrochlorides, phosphates, acetates, oxalates and borates. Salts.

As the Group IVB metal salt, titanium tetrachloride,
Examples thereof include titanium trichloride, potassium titanium fluoride, potassium potassium oxalate, titanium sulfate, titanium tetraiodide, zirconium chloride, zirconium dioxide, zirconium oxychloride, and zirconium tetrachloride.

The alkaline earth metal salts or Group IVB metal salts can be used alone or in combination of two or more. The preferred range of these metal salts is 0.01 to 10
% By weight, and a more preferred range is 0.05 to 5.0% by weight.

Further, silicate electrodeposition as described in US Pat. No. 3,658,662 is also effective. Further, JP-B-46-27481 and JP-A-52-5
No. 8602 and Japanese Patent Application Laid-Open No. 52-30503 are also useful in combination with a support provided with electrolytic grains and a surface treatment combining the above-described anodic oxidation treatment and hydrophilic treatment.

[Hydrophilic undercoat layer] The following hydrophilic undercoat layer can be provided on the silicate-treated aluminum substrate as needed.

Water-soluble resins, for example, polyvinylphosphonic acid, polymers and copolymers having a sulfonic acid group in the side chain, polyacrylic acid, water-soluble metal salts (for example, zinc borate)
Alternatively, a primer coated with a yellow dye, an amine salt or the like is also suitable.

Examples of the organic compound used in the organic (resin) undercoat layer include carboxymethyl cellulose,
Dextrin, gum arabic, phosphonic acids having an amino group such as 2-aminoethylphosphonic acid, phenylphosphonic acid which may have a substituent, naphthylphosphonic acid,
Organic phosphonic acids such as alkyl phosphonic acid, glycerophosphonic acid, methylene diphosphonic acid and ethylene diphosphonic acid, phenylphosphoric acid which may have a substituent, naphthyl phosphoric acid, organic phosphoric acid such as alkyl phosphoric acid and glycerophosphoric acid, Organic phosphines such as phenylphosphinic acid, naphthylphosphinic acid, alkylphosphinic acid and glycerophosphinic acid which may have a substituent, amino acids such as glycine and β-alanine, and hydroquinol such as triethanolamine hydrochloride It is selected from hydrochlorides of amines having a group, but may be used as a mixture of two or more kinds.

The organic undercoat layer can be provided by the following method. That is, a method in which a solution obtained by dissolving the above organic compound in water or an organic solvent such as methanol, ethanol, or methyl ethyl ketone or a mixed solvent thereof is applied to an aluminum substrate and dried to form a solution, and water or methanol, ethanol, methyl ethyl ketone, or the like. An aluminum substrate is immersed in a solution obtained by dissolving the above organic compound in an organic solvent or a mixed solvent thereof to adsorb the organic compound, and then washed with water and dried to form an organic undercoat layer. Is the way. In the former method, a solution of the above organic compound having a concentration of 0.005 to 10% by weight can be applied by various methods. For example, any method such as bar coater coating, spin coating, spray coating, and curtain coating may be used. In the latter method, the concentration of the solution is 0.01 to 20% by weight, preferably 0.05 to 5% by weight, and the immersion temperature is 20 to 90 ° C.
Preferably, the temperature is 25 to 50 ° C., and the immersion time is 0.1 second to
20 minutes, preferably 2 seconds to 1 minute.

The solution used here may be a basic substance such as ammonia, triethylamine or potassium hydroxide, hydrochloric acid,
The pH is adjusted with an acidic substance such as phosphoric acid,
2 can be used. Further, a yellow dye can be added for improving the tone reproducibility of the photopolymerizable lithographic printing plate.

The coating amount of the organic undercoat layer after drying is from 2 to 20.
0 mg / m ² is suitable, preferably 5 to 100 mg.
/ M ² . If the coating amount is less than 2 mg / m ² , sufficient printing durability cannot be obtained. The same is true even if it is larger than 200 mg / m ² .

The aluminum support may be further subjected to a surface treatment such as immersion in an aqueous solution of potassium fluorozirconate, phosphate or the like. (Photopolymerizable photosensitive layer) The main components of the photopolymerizable photosensitive layer used in the present invention is a compound containing an addition-polymerizable ethylenic double bond, a photopolymerization initiator, an organic polymer binder and the like,
If necessary, various compounds such as a coloring agent, a plasticizer, and a thermal polymerization inhibitor are added.

The compound containing an addition-polymerizable double bond is
It can be arbitrarily selected from compounds having at least one, preferably two or more terminal ethylenically unsaturated bonds.

For example, they have a chemical form such as a monomer, a prepolymer, ie, a dimer, a trimer and an oligomer, or a mixture thereof and a copolymer thereof.

Examples of monomers and copolymers thereof include esters of unsaturated carboxylic acids (eg, acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic acid, etc.) and aliphatic polyhydric alcohol compounds. And amides of unsaturated carboxylic acids and aliphatic polyamine compounds.

Specific examples of the ester monomer of the aliphatic polyhydric alcohol compound and the unsaturated carboxylic acid include acrylates such as ethylene glycol diacrylate, triethylene glycol diacrylate, and 1,3.
-Butanediol diacrylate, tetramethylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane tri (acryloyloxypropyl) ether, trimethylolethane triacrylate, hexanediol diacrylate 1,4-cyclohexanediol diacrylate, tetraethylene glycol diacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol diacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, sorbitol Triacry Over DOO, sorbitol tetraacrylate, sorbitol pentaacrylate, sorbitol hexaacrylate, tri (acryloyloxyethyl) isocyanurate, polyester acrylate oligomer.

Examples of the methacrylate include tetramethylene glycol dimethacrylate, triethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate, ethylene glycol dimethacrylate, and 1,3-butanediol. Dimethacrylate, hexanediol dimethacrylate, pentaerythritol dimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipesitaerythritol dimethacrylate, dipentaerythritol hexamethacrylate, dipentaerythritol pentamethacrylate, sorbitol trimethacrylate, sorbitol natramethacrylate , There is bis [p- (3--methacryloxy-2-hydroxypropoxy) Feeru] dimethyl methane, bis [p- (methacryloxyethoxy) phenyl] dimethyl methane.

Examples of itaconic acid esters include ethylene glycol diitaconate, propylene glycol diitaconate, 1,3-butanediol diitaconate,
There are 1,4-butanediol diitaconate, tetramethylene glycol diitaconate, pentaerythritol diitaconate, sorbitol tetritaconate and the like.

The crotonic acid esters include ethylene glycol dicrotonate, tetramethylene glycol dicrotonate, pentaerythritol dicrotonate,
Sorbitol tetradicrotonate and the like.

Examples of the isocrotonic acid ester include ethylene glycol diisocrotonate, pentaerythritol diisocrotonate, and sorbitol tetraisocrotonate.

Examples of the maleic acid ester include ethylene glycol dimaleate, triethylene glycol dimaleate, pentaerythritol dimaleate, and sorbitol tetramaleate.

Further, a mixture of the above-mentioned ester monomers can also be mentioned.

Specific examples of the amide monomer of the aliphatic polyamine compound and the unsaturated carboxylic acid include methylene bis-acrylamide, methylene bis-methacrylamide, 1,6-hexamethylene bis-acrylamide, 1,6- Hexamethylene bis-methacrylamide,
Examples include diethylenetriaminetrisacrylamide, xylylenebisacrylamide, xylylenebismethacrylamide, and the like.

Other examples are described in JP-B-48-417.
08 polyisocyanate compound having two or more isocyanate groups in one molecule described in
A bierurethane compound containing two or more polymerizable vinyl groups in one molecule to which a hydroxyl group-containing vinyl monomer represented by the following general formula (A) is added is exemplified.

CH ₂ ＣC (R ⁵ ) COO ₂ CH (R ⁶ ) OH (A) (where R ⁵ and R ⁶ represent H or CH ₃ ). Urethane acrylates described in JP-A-48-64183.
No., JP-B-49-43191, JP-B-52-3049
Polyfunctional acrylates and methacrylates such as polyester acrylates and epoxy acrylates obtained by reacting an epoxy resin with (meth) acrylic acid as described in JP-A Nos. 0-104, and 2005-112, respectively. Further, the Journal of the Adhesion Society of Japan vol. 20, no. 7, pages 300 to 308 (1984) as photocurable monomers and oligomers can also be used. In addition, the amount of these used is 5-70 weight% with respect to all components.
(Hereinafter abbreviated as%), preferably 10 to 50%.

Examples of the photopolymerization initiator include various photoinitiators known in patents and literatures, depending on the wavelength of the light source used.
Alternatively, a combination system (photoinitiating system) of two or more photoinitiators can be appropriately selected and used.

Various light-initiating systems have been proposed when using visible light of 450 nm or more, an Ar laser, the second harmonic of a semiconductor laser, or an SHG-YAG laser as a light source. For example, US Pat. No. 2,850. Certain photoreducing dyes, for example, rose bengal, eosin, erythrosine, and the like, or a system using a combination of a dye and an initiator, for example, a complex starting system of a dye and an amine (Japanese Patent Publication No. 44-20189). ), A combination of hexaarylbiimidazole, a radical generator and a dye (Japanese Patent Publication No. Sho 4)
5-37377), a system of hexaarylbiimidazole and p-dialkylaminobenzylidene ketone (JP-B-47-2528, JP-A-54-155292), and a system of a cyclic cis-α-dicarbonyl compound and a dye ( Kaisho 4
8-84183), a system of a cyclic triazine and a merocyanine dye (JP-A-54-151024), a system of 3-ketocoumarin and an activator (Tokikai Sho 52-112681, JP-A 58-15503), A system of imidazole, a styrene derivative, and a thiol (JP-A-59-140203);

Organic peroxide and dye system (Japanese Unexamined Patent Publication No.
No. 504, JP-A-59-140203, JP-A-59-140203
No. 189340, JP-A-62-174203, JP-B-62-1641, U.S. Pat. No. 4,766,055), a system of a dye and an active halogen compound (JP-A-63-17181).
No. 05, JP-A-63-258903, Japanese Patent Application No. 2-63
No. 054), a system of a dye and a borate compound (JP-A-6
2-143044, JP-A-62-150242, JP-A-64-13140, JP-A-64-13141,
JP-A-64-13142, JP-A-64-13143
JP-A-64-13144, JP-A-64-1704
8, JP-A-1-229003, JP-A-1-2983
No. 48, JP-A-1-138204, etc., and a system of a dye having a rhodanine ring and a radical generator (JP-A No. 2-17)
No. 9643, JP-A-2-244050), a system of titanocene and 3-ketocoumarin dye (JP-A-63-22111).
No. 0), a system in which a titanocene is combined with a xanthene dye and an addition-polymerizable ethylenically unsaturated compound containing an amino group or a urethane group (JP-A-4-221958)
JP-A-4-219756), a system of titanocene and a specific merocyanine dye (JP-A-6-295061),
A dye system having a titanocene and a benzopyran ring (Japanese Patent Application No. Hei 7-164585) can be exemplified.

The titanocene compound used as a photopolymerizable initiation system in the present invention may be any titanocene compound capable of generating an active radical when irradiated with light in the presence of the above-described sensitizing dye. For example, JP-A-59-152396, JP-A-61-151197
A known compound described in JP-A No. 5-211 can be appropriately selected and used.

More specifically, di-cyclopentadienyl-Ti-di-chloride, di-cyclopentadienyl-Ti-bis-phenyl, di-cyclopentadienyl-Ti-bis-2,3,3 4,5,6-pentafluorophenyl-1-yl (hereinafter also referred to as “A-1”), di-cyclopentadienyl-Ti-bis-2,3,5,6-tetrafluorophenyl-1- Yl, di-cyclopentadienyl-Ti-bis-2,4,6-trifluorophenyl
1-yl, di-cyclopentadiphenyl-Ti-bis-
2,6-difluorophenyl-1-yl, di-cyclopentadienyl-Ti-bis-2,4-difluorophenyl
1-yl, di-methylcyclopentadienyl-Ti-bis-2,3,4,5,6-pentafluorophenyl-1-
Yl (hereinafter also referred to as “A-2”), di-methylcyclopentadienyl-Ti-bis-2,3,5,6-tetrafluorophenyl-1-yl, di-methylcyclopentadienyl-Ti -Bis-2,4-difluorophenyl-1-
Il, bis (cyclopentadieel) -bis (2,6-
And difluoro-3- (pyrid-1-yl) pheel) titanium (hereinafter also referred to as “A-3”).

The titanocene compounds used in the photopolymerizable composition can be used alone or in combination of two or more.

The amount of the photopolymerization initiator used is 0.05 to 10 parts by weight based on 100 parts by weight of the ethylenically unsaturated compound.
0 parts by weight, preferably 0.1 to 70 parts by weight, and more preferably 0.2 to 50 parts by weight.

The photopolymerizable composition usually contains an organic polymer as a binder. In the present invention, a polymer having a crosslinkable group in a side chain is used. Such an organic high molecular polymer (hereinafter also simply referred to as a polymer) itself has a crosslinkable group (also referred to as an unsaturated group) and a carboxyl group in a side chain, and the crosslinkable group has the following general formula: [I]

[0156]

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[Wherein R _{1 to} R ₅ are hydrogen, halogeno, carboxyl, sulfo, nitro, cyano, amide, amino, alkyl, aryl, each of which may have a substituent,
Alcoquin, aryloquin, alkylamino, arylamino, cyclic alkyl, alkylsulfonyl, arylsulfonyl, wherein Z is oxygen, sulfur, N
H or NR (R is an alkyl group)].

Further, polymers having a crosslinkable group in a side chain used as a binder for the photopolymerizable photosensitive layer are described in US Pat. Nos. 3,376,138 and 3,556,792.
No. 3,556,793, the disclosed polymer is a polymer itself,
It is used as a photocrosslinkable resist, and has a clear difference from the method of using the photopolymerizable composition described in this embodiment as a binder.

The methods for synthesizing the above polymers are roughly classified into the following two methods.

(Method A): A compound represented by the following general formula [Ia] is subjected to a polymer reaction with a carboxylic acid, a carboxylic acid halide, and a backbone polymer having a carboxylic anhydride group as a side chain.

[0161]

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(Wherein, R _{1 to} R ₅ have the same meanings as in the case of the general formula [I]): -COO-, -COS
-, -CONH- or -CONR- a method of introducing via each connecting group.

(Method B): A monomer having a crosslinkable group represented by the above general formula [I] and an ethylenically unsaturated group having a higher addition polymerization reactivity than the crosslinkable group is converted to an unsaturated carboxylic acid. A method of obtaining a polymer by copolymerization.

[0164]

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[Wherein, R _{1 to} R ₅ have the same meanings as in formula [I], and Y represents OH, —SH, —NH ₂ , —NHR
(R is an alkyl group) or a halogen atom. The alkyl group of R _{1 to} R _{5 in} the general formula [Ia] is
It may be linear, branched, or cyclic, and has 1 to 7 carbon atoms.
Preferably has, even in these alkyl group, an alkoxy group having from 1 to 2 carbon atoms, an alkoxycarbonyl group having 1 to 3 carbon atoms, a phenyl group may have a substituent such as hydroxy group, R ₁ As the aryl group represented by R ₅ to R _5, a phenyl group and a furyl group are preferable, including a halogeno group (eg, chloro, bromo, etc.), a hydroxy group,
May have a substituent such as an alkyl group, an aryl group (e.g., phenyl and methkinphenyl), an alkoxy group having 1 to 7 carbon atoms, a nitro group, an amino group, and an N, N-dialkylamino group. . The alkoxy group of R _{1 to} R ₅ is preferably a group having 1 to 7 carbon atoms, and the aryloxy group is preferably a phenyl okine group, which has a substituent such as an alkyl or alkoxy group having 1 to 7 carbon atoms. May be. The alkylamino group of R _{1 to} R ₅ is preferably a group having 1 to 15 carbon atoms, and the arylamino group is preferably a phenylamino group or a naphthylamino group. The alkylsulfonyl group represented by R _{1 to} R ₅ is preferably a group having 1 to 15 carbon atoms, and the arylsulfonyl group is preferably a phenylsulfonyl group. May have a substituent such as an alkoxy group and an amino group.

When the method A is described in more detail, examples of the backbone polymer include a copolymer of acrylic acid or methacrylic acid and a copolymer in which the copolymer is an acid halide by a polymer reaction. Further, copolymers such as maleic anhydride and itaconic anhydride can be used. Examples of the comonomer to be copolymerized include styrene or an alkyl-substituted derivative thereof, an alkyl acrylate, an aryl acrylate, an alkyl methacrylate, an aryl methacrylate, or an aliphatic vinyl ester. Preferably acrylic acid or methacrylic acid and methyl acrylate, ethyl acrylate, butyl acrylate, benzyl acrylate, methyl methacrylate,
Copolymers with ethyl methacrylate, butyl methacrylate, and benzyl methacrylate are exemplified. In order to introduce a crosslinkable group into these copolymers, a crosslinkable alcohol, an amine, a thiol, or a halide represented by the general formula [Ia] is reacted with the above copolymer in a reaction solvent under predetermined reaction conditions. It is obtained by mixing and dissolving, adding a reaction catalyst and a polymerization inhibitor, and heating. Specifically, a copolymer of methacrylic acid and benzyl methacrylate is shown below as an example.

A poly (methacrylic acid / benzyl methacrylate = 27/73) was placed in a 300 ml three-necked flask equipped with a stirring rod and stirring blades, a reflux condenser and a thermometer.
19.8 g), 40.2 g of ethylene glycol monomethyl ether acetate as a reaction solvent, 6.0 g of allyl bromide as a reagent containing a crosslinkable group, and 10.4 g of trimethylbenzylammonium hydroxide as a catalyst.
g of paramethoxyphenol and 0.1 g of paramethoxyphenol as a polymerization inhibitor.
And mixed and dissolved at 70 ° C. in a nitrogen atmosphere.
Heating and stirring were performed for hours. After cooling, methyl ethyl ketone is added to remove free quaternary salts. Further, the mixture is diluted with methanol and poured into dilute hydrochloric acid to precipitate. After washing with water, suction filtration and vacuum drying, the yield of polymer obtained is 1
It was 3.6 g. Allyl groups were introduced at 35% relative to the carboxylic acid of the backbone polymer.

[0168]

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A synthesis example in which the crosslinkable group is introduced into a copolymer of maleic anhydride can be carried out by the method described in US Pat. No. 2,047,398, whereby the maleic anhydride moiety is formed. A ring-opened unsaturated ester, amide, thioester or the like is introduced. As a method for introducing a crosslinkable group into a maleic anhydride copolymer, JP-A-48-82
A similar example described in Japanese Patent Application Laid-Open No. 902/1990 is mentioned, but the crosslinkable group by this method is bonded to the nitrogen atom of maleic imide, and is clearly a compound different from the above-mentioned polymer, and is used in the present invention. Polymer having a crosslinkable group in the side chain.

On the other hand, the method B will be described in more detail. The monomer containing at least two carbon-carbon double bonds having a crosslinkable group can be obtained by a known synthesis method using an alcohol, amine, or thiol having the crosslinkable group. And unsaturated carboxylic acids,
Preferably, it is synthesized by a condensation reaction with acrylic acid or methacrylic acid. By copolymerizing the monomer containing at least two or more unsaturated groups with an unsaturated carboxylic acid, preferably acrylic acid or methacrylic acid, a copolymer having the crosslinkable group is obtained. The monomer to be copolymerized may further be copolymerized with another monomer in addition to the unsaturated carboxylic acid, for example, alkyl acrylate, alkyl methacrylate, benzyl methacrylate, 2-hydroquinethyl methacrylate, acrylonitrile, and the like. No.

Hereinafter, an example of copolymerization of allyl methacrylate and methacrylic acid will be described. As a similar synthesis method, a method described in US Pat. No. 2,047,398 can be mentioned.

1.68 liters of 1,2-dichloroethane as a reaction solvent was placed in a 3 liter 4-neck flask equipped with a stirring rod and a stirring blade, a reflux condenser, a dropping funnel and a thermometer, and heated to 70 ° C. while purging with nitrogen. did. 100.8 g of allyl methacrylate, 7.6 g of methacrylic acid, and 1.68 g of 2,2′-azobis (2,4-dimethylvaleronitrile) as a polymerization initiator were added to a dropping funnel in an amount of 0.1 g.
The mixture was dissolved in 44 liters of 1,2-dichloroethane, and the mixed solution was dropped into the flask over 2 hours with stirring.

After the completion of the dropwise addition, the mixture was further stirred at a reaction temperature of 70 ° C. for 5 hours to complete the reaction. After the completion of heating, 0.04 g of paramethokine phenol was added as a polymerization inhibitor, and the reaction solution was added to 50 parts.
The solution was concentrated to 0 ml, and the concentrated solution was added to 4 liters of hexane to precipitate. After vacuum drying, 61 g (yield 56%) of a copolymer was obtained. At this time, the viscosity was [η] = 0.068 for methyl ethyl ketone at 80 ° C.

Representative compounds represented by the general formula [Ia] include allyl alcohol, 2-methylallyl alcohol, crotyl alcohol, 3-chloro-2-propen-1-ol, and 3-phenyl-2. -Propen-1-ol, 3- (hydroquinphenyl) -2-propen-1-
All, 3- (2-hydroxyphenyl) -2-propen-1-ol, 3- (3.4-dihydroxyphenyl) -2-propen-1-ol, 3- (2.4-dihydroxyphenyl-2-ol Propen-1-ol, 3-
(3,4-5-trihydroquinphenyl) -2-propen-1-ol, 3- (3-methoxy-4-hydroquinphenyl) -2-propen-1-ol, 3- (3.4
-Dihydroxy-5-methoxyphenyl) -2-propen-1-ol, 3- (3.5-dimethoxy-4-hydroxyphenyl) -2-propen-1-ol, 3-
(2-hydroxy-4-methylphenyl) -2-propen-1-ol, 3- (4-methoxyphenyl) -2-
Propen-1-ol, 3- (4-ethoxyquinphenyl)
-2-propen-1-ol, 3- (2-methoxyphenyl) -2-propen-1-ol, 3- (3-4-dimethoxyphenyl) -2-propen-1-ol, 3-
(3-methoxy-4-propoxyphenyl) -2-propen-1-ol,

3- (2-4,6-trimethoxyphenyl) -2-propen-1-ol, 3- (3-methoxy-4-benzyloxyphenyl) -2-propen-1-
All, 3-1- (3′-methokinphenyl) -4-benzyloxyphenyl) -2-propen-1-ol,
3-phenoxy-3-phenyl-2-propen-1-ol, 3- (3.4.5-trimethoxyphenyl) -2
-Propen-1-ol, 3- (4-methylphenyl)
-2-propen-1-ol, 3-phenyl-3- (2
* 4,6-trimethylphenyl) -2-propene-1-
All, 3,3- {di- (2,4,6-trimethylphenyl)}-2-propen-1-ol, 3-phenyl-
3- (4-methylphenyl) -2-propen-1-ol, 3,3-diphenyl-2-propen-1-ol,
3- (2-chlorophenyl) -2-propen-1-ol, 3- (3-chlorophenyl) -2-propen-1-
All, 3- (4-chlorophenyl) -2-propene-
1-ol, 3- (2.4-dichlorophenyl) -2-
Propen-1-ol, 3- (2-bromophenyl)-
2-propen-1-ol, 3-bromo-3-phenyl-2-propen-1-ol, 3-chloro-3-phenyl-2-propen-1-ol, 3- (4-nitrophenyl) -2 -Propen-1-ol,

3- (2-nitrophenyl) -2-propen-1-ol, 3- (3-nitrophenyl) -2-propen-1-ol, 2-methyl-3-phenyl-2-
Propen-1-ol, 2-methyl-3- (4-chlorophenyl) -2-propen-1-ol, 2-methyl-
3- (4-nitrophenyl) -2-propen-1-ol, 2-methyl-3- (4-aminophenyl) -2-propen-1-ol, 2-methyl-3-3.3-diphenyl-2- Propen-1-ol, 2-ethyl-1 / 3-diphenyl-2-propen-1-ol, 2-ethoxymethylene-3-phenyl-2-propen-1-ol, 2
-Phenoxy-3-phenyl-2-propen-1-ol, 2-methyl-3- (4-methoxyphenyl) -2-
Propen-1-ol, 2,3-diphenyl-2-propen-1-ol, 1,2,3-triphenyl-2-propen-1-ol, 2,3,3-triphenyl-2-
Propen-1-ol, 2-ethoxy-3-phenyl-
2-propen-1-ol, 1.3-diphenyl-2-
Propen-1-ol, 1- (4-methylphenyl)-
3-phenyl-2-propen-1-ol, 1-phenyl-3- (4-methylphenyl) -2-propen-1-
All, 1-phenyl-3- (4-methoxyphenyl)
-2-propen-1-ol, 1- (4-methoxyphenyl) -3-phenyl-2-propen-1-ol,

1,3-di (4-chlorophenyl) -2-
Propen-1-ol, 1- (4-bromophenyl)-
3-phenyl-2-propen-1-ol, 1-phenyl-3- (4-nitrophenyl) -2-propen-1-
All, 1,3-di (2-nitrophenyl) -2-propen-1-ol, 1- (4-dimethylaminophenyl) -3-phenyl-2-propen-1-ol, 1-
Phenyl-3- (4-dimethylaminophenyl) -2-
Propen-1-ol, 1,1-di (4-dimethylaminophenyl) -3-phenyl-2-propen-1-ol, 1.1,3-triphenyl-2-propen-1-ol, 1. 1,3,3-tetraphenyl-2-propen-1-ol, 1- (4-methylphenyl) -3-phenyl-2-propen-1-ol, 1- (dodecylsulfonyl) -3-phenyl-2 -Propen-1-ol,
1-phenyl-2-propen-1-ol, 1,2-diphenyl-2-propen-1-ol, 1-phenyl-
2-methyl-2-propen-1-ol, 1-cyclohexyl-2-propen-1-ol, 1-phenoxy-
2-propen-1-ol, 2-benzyl-2-propen-1-ol, 1.1-di (4-chlorophenyl)-
2-propen-1-ol, 1-carboxy-2-propen-1-ol,

1-carboxamido-2-propene-1
-Ol, 1-cyano-2-propen-1-ol, 1
-Sulfo-2-propen-1-ol, 2-ethoxy-
2-propen-1-ol, 2-amino-2-propen-1-ol, 3- (3-amino-4-methoxyphenylsulfonyl) -2-propen-1-ol, 3- (4
-Methylphenylsulfonyl) -2-propen-1-ol, 3-phenylsulfonyl-2-propen-1-ol, 3-benzylsulfonyl-2-propen-1-ol, 3-anilinosulfonyl-2-propene- 1-ol, 3- (4-methoxyanilinosulfonyl) -2-
Propen-1-ol, 8-anilino-2-propene-
1-ol, 3-naphthylamino-2-propene-1-
All, 3-phenoxy-2-propen-1-ol,
3- (2-methylphenyl) -2-propen-1-ol, 3- (3-methylphenokine) -2-propen-1
-Ol, 3- (2,4-dimethylphenyl) -2-propen-1-ol, 1-methyl-3-carboxy-2
-Propen-1-ol, 3-carboxy-2-propen-1-ol, 3-bromo-3-carboxy-2-propen-1-ol, 1-carboxy-3-chloro-3
-Methyl-2-propen-1-ol, 1-carboxy-3-methyl-2-propen-1-ol,

1- (2-carbethoxyisopropyl)-
3-methyl-2-propen-1-ol, 1- (1-carbethoxypropyl) -2-propen-1-ol,
-(1-carbethoxyethyl) -3-methyl-2-propen-1-ol, 1-carbethoxy-3-chloro-3
-Methyl-2-propen-1-ol, 1-carbethoxymethylene-3-methyl-2-propen-1-ol,
1-amido-2 / 3-dimethyl-2-propen-1-ol, 1-cyano-3-methyl-2-propen-1-ol, 3-sulfo-2-propen-1-ol, 3-butoxy- 2-propen-1-ol, 1-cyclohexyl-3- (2-hydroxycyclohexyl) -2-propen-1-ol, 3-cyclobenzyl-2-propen-1-ol, 3-furyl-2- Propen-1-ol, 3-chrom-2-propen-1-ol, 3-bromo-2-propen-1-ol, 2-methyl-3-chloro-2-propen-1-ol, 2-methyl- 3-bromo-2-propen-1-ol, 1-carboisobutoxy-3-chloro-3-methyl-2-propen-1-ol, 2-chloro-3-phenyl-2-propen-1-ol ( 2-chlorosi Cinnamyl alcohol), 2-bromo-3-phenyl-2-propen-1-ol (2-bromo cinnamyl alcohol),

2-bromo-3- (4-nitrophenyl)
-2-propen-1-ol, 2-fluoro-3-phenyl-2-propen-1-ol (2-fluorocinnamyl alcohol), 2-fluoro-3- (4-methoxyphenyl) -2-propene- 1-ol, 2-nitro-
3-chloro-3-phenyl-2-propen-1-ol, 2-nitro-3-phenyl-2-propen-1-ol (2-nitrocinnamyl alcohol), 2-cyano-3-phenyl-2-ol Propen-1-ol (2-cyanocinnamyl alcohol), 2-chloro-2-propen-1-ol (2-chloroallyl alcohol), 2-bromo-2-propen-1-ol (2-bromoallyl alcohol) ), 2-carboxy-2-propen-1-ol (2-carboxyallyl alcohol), 2-carbethoxy-2-propen-1-ol (2-carbethoxyallyl alcohol), 2-sulfonic acid-2-propene- 1
-Ol (2-allyl alcohol sulfonate), 2-nitro-2-propen-1-ol (2-nitroallyl alcohol), 2-bromo-3 / 3-difluoro-2-propen-1-ol, 2- Chlor-3-3-difluoro-2-propen-1-ol, 2-fluoro-3-chloro-2-propen-1-ol, 2,3-dibromo-3
-Carboxy-2-propen-1-ol,

2 / 3-diiodo-3-carboxy-2-
Propen-1-ol, 2,3-dibromo-2-propen-1-ol, 2-chloro-3-methyl-2-propen-1-ol. In the above specific examples, a compound in which the alcohol at the 1-position is replaced with a thioalcohol, an amine or a halogen can of course be used.

The preferred range of the crosslinkable group content in the polymer is 10 to 90 mol%,
60 mol%, a more preferable range is 20 to 70 mol%,
0 to 40 mol%.

Similarly, there is an acidic cellulose derivative having a carboxylic acid group in the side chain. In addition, those obtained by adding a cyclic acid anhydride to an addition polymer having a hydroxyl group are useful. In particular, among these, [benzyl (meth) acrylate / (meth) acrylic acid / optionally other addition-polymerizable vinyl monomers] copolymer and [allyl (meth) acrylate (meth) acrylic acid / optionally Other addition-polymerizable vinyl monomers) copolymers are preferred. In addition, as the water-soluble organic polymer, polybierpyrrolidone, polyethylene oxide and the like are useful. In order to increase the strength of the cured film, alcohol-soluble polyamides and polyethers of 2,2-bis- (4-hydroquinphenyl) -propane and epichlorohydrin are also useful.
These organic high-molecular polymers can be mixed in an arbitrary amount in the entire composition. However, if it exceeds 90% by weight, no favorable result is obtained in view of the strength of the formed image and the like. Preferably 10 to 90%, more preferably 30 to 8
0%. The weight ratio of the photopolymerizable ethylenically unsaturated compound and the organic high molecular weight polymer is preferably in the range of 1/9 to 9/1. A more preferred range is 2/8 to 8 /
2, more preferably 3/7 to 7/3.

In the present invention, in addition to the above basic components, a small amount of thermal polymerization is inhibited in order to prevent unnecessary thermal polymerization of a polymerizable ethylenically unsaturated compound during the production or storage of the photosensitive composition. It is desirable to add an agent. Suitable thermal polymerization inhibitors include haloid quinone, p-
Methkinphenol, di-t-butyl-p-cresol, pyrogallol, t-butylcatechol, benzoquinone, 4,4'-thiobis (3-methyl-6-t-butylphenol), 2,2'-methylenebis (4- Methyl-
6-t-butylphenol), cerium N-nitrosophenylhydroxylamine, aluminum aluminum N-nitrosophenylhydroxylamine and the like.
The addition amount of the thermal polymerization inhibitor is preferably from about 0.01% to about 5% based on the weight of the whole composition. Further, if necessary, a higher fatty acid derivative such as behenic acid or behenic acid amide may be added to prevent polymerization inhibition by oxygen, and may be unevenly distributed on the surface of the photosensitive layer in a drying process after coating. . The amount of the higher fatty acid derivative added is about 0.5% to about 1% of the total composition.
0% is preferred.

Further, a coloring agent may be added for the purpose of coloring the photosensitive layer. As the colorant, for example, a phthalocyanine-based pigment (CI Pigment Blue 15:
3, 15: 4, 15: 6), azo pigments, carbon black, pigments such as titanium oxide, ethyl violet, crystal violet, azo dyes, anthraquinone dyes, and cyanine dyes. The amount of dye and pigment added is preferably about 0.5% to about 20% of the total composition.

In addition, additives such as inorganic fillers and plasticizers such as dioctyl phthalate, dimethyl phthalate and tricresyl phosphate may be added to improve the physical properties of the cured film.

The addition amount of these is preferably 10% or less of the total composition.

When the photopolymerizable composition is coated on a support, it is used after being dissolved in various organic solvents. As the solvent used here, acetone, methyl ethyl ketone,
Cyclohexane, ethyl acetate, ethylene dichloride,
Tetrahydrofuran, toluene, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol dimethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, acetylacetone, cyclohexanone, diacetone alcohol, ethylene glycol monomethyl ether acetate, ethylene glycol ethyl ether acetate, Ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether acetate, 3-methoxypropanol, methoxymethoxyethanol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether Ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, 3-meth Kin-propyl acetate, N, N- dimethylformamide, dimethyl sulfoxide, .gamma.-butyrolactone, methyl lactate and ethyl lactate. These solvents can be used alone or as a mixture. The appropriate concentration of the solid content in the coating solution is 1 to 50% by weight.

A surfactant can be added to the photopolymerizable composition of the present invention in order to improve the coated surface quality.

The amount of the coating is about 0. lg /
range of m ² ~ about 10 g / m ² are suitable. More preferably, it is 0.3 to 5 g / m ² . More preferably 0.5 to
3 g / m ² .

[Overcoat layer] The overcoat layer of the present invention (C) is an oxygen-blocking overcoat layer.
This overcoat layer contains a water-soluble vinyl polymer. The water-soluble vinyl polymer contained in the overcoat layer contains polyvinyl alcohol and its partial esters, ethers and acetal, or a substantial amount of terminally substituted vinyl alcohol units that have the necessary water solubility. The copolymer is mentioned. Examples of the polyvinyl alcohol include those having a hydrolysis degree of 71 to 100% and a polymerization degree of 300 to 2400. Specifically, Kuraray's PVA-105, Pv
A-110, PVA-117, PVA-117H, PV
A-120, PVA-124, PVA-124H, PV
A-CS, PVA-CST, PVA-HC, PVA-2
03, PVA-204, PVA-205, PVA-21
0, PVA-217, PVA-220, PVA-22
4, PVA-217EE, PVA-220, PVA-2
24, PVA-217EE, PVA-217E, PVA
-220E, PVA-224, PVA-405, PVA
-420, PVA-613, L-8 and the like. The above-mentioned copolymers include polyvinyl acetate chloroacetate or propionate, polybierformal and polybieracetal hydrolyzed 88 to 100%, and copolymers thereof. Other useful polymers include polyvinylpyrrolidone, gelatin and gum arabic, which may be used alone or in combination.

As a solvent used for applying the overcoat layer, pure water is preferable, but alcohols such as methanol and ethanol, and ketones such as acetone and methyl ethyl ketone may be mixed with the pure water. The concentration of the solid content in the coating solution is suitably from 1 to 20% by weight.

Further, known additives such as a surfactant for further improving the coating property and a water-soluble plasticizer for improving the physical properties of the film may be added to the overcoat layer. Examples of the water-soluble plasticizer include propionamide, cyclohexanediol, glycerin, and sorbitol. Further, a water-soluble (meth) acrylic polymer or the like may be added.

The amount of the coating was about 0.1 / m 2 after drying.
A range from ² to about 15 / m ² is suitable. More preferably, it is 1.0 / m ² to about 5.0 / m ² .

In this embodiment, one personal computer is connected online to the workstation 12 for the sake of explanation. However, the number of personal computers is not limited to one, and a plurality of personal computers can be connected online. Similarly,
In the present embodiment, for the sake of explanation, one PS plate processor 16 is connected online to the plate setter 14, but the present invention is not limited to one, and a plurality of personal computers can be connected online to the plate setter 14.

When a plurality of personal computers are connected online to the plate setter 14, conditions such as changing heating conditions can be set more efficiently, so that the loss time can be reduced and the efficiency is improved.

Further, in this embodiment, the area distribution information is extracted by the setter control unit 18 of the plate setter 14.
The image data area included in the F file may be configured to extract the area distribution of the image forming area (or the area distribution of the non-image area) as the area distribution information. In this case, a program for extracting the area distribution of the image forming area (or the area distribution of the non-image area) from the image data section included in the TIFF file as area distribution information may be installed in the PS plate processor 16.

Further, in the present embodiment, the image data output from the workstation is a TIFF file. However, the present invention is not limited to the TIFF file. PPF (Print Production Forma) which consists of transfer characteristic curve, color density information for registration mark type and position data quality control, trimming mark and cutting information
t) It is possible to use image data of a standard format including image data such as data and GIF files.

In the present embodiment, the plate setter 14 and the PS plate processor 16 are connected online. However, the present invention is not limited to the online connection. The information of the plate setter 14 may be stored on the medium as setter information, and the storage medium may be read by the PS version processor 16 to transfer the setter information.

In the present embodiment, the area distribution extraction program is stored in the ROM of the setter control unit 18. However, the present invention is not limited to this, and the area distribution extraction program is stored on a floppy disk. Alternatively, the computer may be provided with a hard disk, read out the area distribution extraction program from the floppy disk, and installed on the hard disk. Further, the area distribution extraction program may be transmitted to a wired or wireless network by a transmission means such as a telephone line and installed.

Note that the area distribution extraction program is not limited to being stored on a floppy disk, but may be stored on a CD-RO.
M, the program is stored on a magnetic tape, and the CD-RO
M, a magnetic tape may be installed on the hard disk of the personal computer. Further, a hard disk storing the area distribution extraction program may be provided. Further, the area distribution extraction program may be directly written in the hard disk or RAM of the personal computer. As described above, the area distribution extraction program can be distributed by at least one of a tangible recording medium and a transmission unit.

[0202]

As described above, according to the present invention, it is possible to set an appropriate temperature condition for an actually formed image forming area, and to perform operations such as forgetting to change or input error. There is an effect that heat treatment can be performed without making a mistake.

Further, in the case of controlling not to heat the unexposed portion other than the image forming area, the energy required for heating can be suppressed lower than in the case where the entire surface is uniformly heated. As it can reduce power consumption,
There is an effect that the running cost of the device can be reduced and energy can be saved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic flow of a plate making system according to an embodiment.

FIG. 2 is an explanatory diagram showing a schematic configuration of the automatic developing machine shown in FIG.

FIG. 3 is a perspective view showing a schematic configuration of a heating device included in the automatic developing machine shown in FIG.

FIG. 4 is a flowchart illustrating an operation of a CPU of a heating control unit illustrated in FIG. 3;

5 is a top view illustrating a relationship between a moving state of a shutter mechanism of the heating device shown in FIG. 3 and a heating target area.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Personal computer 12 Workstation 14 Plate setter 16 PS plate processor 18 Setter control part 20 Heating part 22 Washing part 24 Developing part 26 Washing part 28 Finisher part 29 Drying part 30 Processor control part 31, 62, 68, 72, 75, 92, 94, 104
Roller pair 32 Heating device 34 Heating means 36 Conveying roller 38 Heating control unit 40 Shutter mechanism 42 Far-infrared heater 44 Reflector 46a, 46b Heat insulating plate 48a, 48b Moving mechanism 50a Rack 52a Pinion 54a, 54b Motor 60 Rinsing layer 61, 79, 91 Overflow pipe 63 Cleaning water tank 64a, 64b Cleaning water supply nozzle 66, 71a, 71b Rotary brush roller 67 Backup roller 70 Developing tank 73 Liquid level cover 74 Developer injection nozzle 76 Dilution water injection nozzle 77 Guide plate 78, 96, 98 spray Pipe 80 Waste liquid tank 82 Developer storage layer 84 Water storage layer 90 Rinse tank 93 Storage tank 100 Gum liquid tank 102 Gum liquid injection nozzle 102a Image forming area 102b Image forming area 110 PS plate

Claims (2)

[Claims] 1. A method of making a lithographic printing plate comprising the following steps (1) to (4). (1) A step of exposing a lithographic printing plate having a photopolymerizable photosensitive layer based on image data to form an exposed image. (2) A step of obtaining area distribution information of an image area of an exposed image from the image data before or after the step (1), and determining a heating distribution based on the area distribution information. (3) A step of heating the lithographic printing plate on which the exposure image is formed with the heating distribution determined in the step (2) after the steps (1) and (2). (4) A step of developing the lithographic printing plate after the step (3). 2. A heating means for heating the lithographic printing plate before development of an exposed lithographic printing plate having a photopolymerizable photosensitive layer, and an exposure comprising the photopolymerizable photosensitive layer by the heating means. A heating control means for controlling a heating distribution given to the lithographic printing plate based on area distribution information of an image forming area formed on the lithographic printing plate when heating the processed lithographic printing plate; Machine.