JPH11115333A - Aluminum alloy plate for printing plate and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the formation of a uniform pits without un-etched part through a short time electrolytic roughening and, at the same time, the uniform formation of roughened pits even when shallow pits are dealt. SOLUTION: This alloy plate has a composition consisting of 0.20-0.6 wt.% of Fe, 0.03-0.15 wt.% of Si, 0.005-0.05 wt.% of Ti, when necessary, 0.005-0.20 wt.% of Ni and the remainder of A and inevitable impurities. Some part or all of the elements form intermetallic compounds. Among the intermetallic compounds, the number of the intermetallic compounds, which are present at the surface of the plate and the particle side of which is 1-10 μm, lies within 1,000-8,000/mm. The percentage of the number of the intermetallic compounds, which are present at the surface of the plate and the particle size of which is 1-5 μm, is 80% or more of the number of the intermetallic compounds, which are present at the surface of the plate and the particle size of which is 1-10 μm. An aluminum alloy ingot having the above-mentioned composition is homogenized at 500-630 deg.C and then hot-rolled under the starting temperature of 400-450 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an aluminum plate for a lithographic printing plate and a method for producing the same, and more particularly to an aluminum alloy plate for a printing plate capable of forming a uniform electrolytically roughened surface and a method for producing the same.

[0002]

2. Description of the Related Art In offset printing, the use of aluminum as a support has been conventionally performed, and it is necessary to roughen the surface of the photosensitive film from the viewpoint of adhesion of a photosensitive film and water retention of a non-image area. is necessary.

[0003] Conventionally, as this surface roughening method,
There are mechanical treatment methods such as a ball polishing method and a brush polishing method. Recently, the plate surface is electrochemically roughened using hydrochloric acid or an electrolytic solution mainly composed of hydrochloric acid and an electrolytic solution mainly composed of nitric acid. An electrolytic surface roughening treatment method for forming a surface, or a treatment method combining the above-mentioned mechanical treatment method and the electrolytic surface roughening treatment method has been mainly used. The reasons for this include that the roughened plate obtained by electrolytic surface roughening has excellent plate making suitability and excellent printing performance, and is suitable for continuous processing of coil materials.

[0004] The aluminum alloy plate for a printing plate used as described above is required to be formed with uniform irregularities by a surface roughening treatment. Has improved adhesion and water retention, and a printing plate having excellent image clarity and printing durability can be obtained. Furthermore,
In recent years, in order to reduce the cost of the surface roughening treatment, there has been a demand for the development of a material having an excellent electrolytic surface roughening efficiency capable of obtaining uniform irregularities in a shorter time or with a smaller amount of electricity.

As an aluminum alloy sheet having excellent electrolytic surface roughening efficiency, for example, Japanese Patent Application Laid-Open No. 58-210144 discloses a group consisting of Fe: 0.2 to 1.0%, Sn, In, Ga and Zn. Contains at least one element selected from the group consisting of 0.05 to 0.1% and Cu: 0.1 to 2%, exhibits an excellent dissolution rate for a chemical etching treatment, and forms uniform pits. It is disclosed that an intermetallic compound is formed so as to promote it.

Japanese Patent Application Laid-Open No. 3-177528 discloses that the composition is such that Fe: 0.1 to 0.5%, Si: 0.0
3 to 0.30%, Cu: 0.001 to 0.03%,
Ni: 0.001 to 0.03%, Ti: 0.002 to 0.05%, and Ga: 0.005 to 0.020%
And the total content of Ga and Ti in the range of 0.010 to 0.050% to improve the uniformity of the rough surface is disclosed.

[0007]

However, recently,
In order to reduce costs, there is a demand for an improvement in the electrolytic processing speed, and uniform pits are formed by a short electrolytic surface roughening treatment, and even if the pits are shallow, etching is performed uniformly in a short time. Therefore, it is demanded that an unetched portion does not occur in the aluminum plate. However, the conventional aluminum plate has not satisfied such a demand.

The present invention has been made in view of the above-mentioned problems, and it is possible to form uniform pits having no unetched portions by a short electrolytic surface roughening treatment and to obtain a rough pit even when the pits are shallow. An object of the present invention is to provide an aluminum alloy plate for a printing plate capable of uniformly forming surface pits and a method for manufacturing the same.

[0009]

The aluminum alloy plate for a printing plate according to the present invention comprises Fe: 0.20 to 0.6% by weight, Si: 0.03 to 0.15% by weight, Ti: 0.0
0.05 to 0.05% by weight and, if necessary, Ni: 0.
005 to 0.20% by weight, with the balance being Al and unavoidable impurities. In the aluminum alloy plate for a printing plate of the present invention, a part or all of the elements form an intermetallic compound, and among the intermetallic compounds, a metal present on the surface and having a particle size of 1 to 10 μm. Intermediate compound is 1
000 to 8000 / mm ² .

The method for producing an aluminum alloy plate for a printing plate according to the present invention is characterized in that Fe: 0.20 to 0.6% by weight,
i: 0.03 to 0.15% by weight, Ti: 0.005 to 0.05% by weight, and if necessary, Ni: 0.005%
To 0.20% by weight, with the balance being 500 to 6 parts in an aluminum alloy ingot consisting of Al and inevitable impurities.
There is a step of homogenizing at a temperature of 30 ° C., and then a step of hot rolling at an initial temperature of 400 to 450 ° C. Thereby, the method of the present invention allows the surface to have a particle size of 1 to 1
0-μm intermetallic compound 1000-8000 / mm
⁽²⁾ It is characterized in that a deposited aluminum alloy plate for a printing plate is obtained. In this case, after the hot rolling, cold rolling, intermediate annealing, and final cold rolling can be sequentially performed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. In order to obtain an aluminum alloy plate for a printing plate in which unetched portions are not generated even in a short-time treatment, and uniform etching pits are obtained, the present inventors have proposed:
As a result of intensive research, in addition to managing the alloy elements Fe, Si, Ti, and Ni contained in the aluminum alloy plate, some or all of these alloy elements are present on the surface among the intermetallic compounds formed It has been found that it is effective to control the number of intermetallic compounds having a particle diameter of 1 to 10 μm. Since the intermetallic compound generates a potential difference between the aluminum matrix and the aluminum matrix, the intermetallic compound acts as a starting point of initial pits during electrolytic surface roughening, and has a great effect on the etching properties and the uniformity of the rough surface of the material. Among them, intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface have a great effect, and therefore, it is extremely important to control the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface as described above. is there.

When manufacturing the above-mentioned aluminum alloy plate for a printing plate, in addition to the above-mentioned composition, the number of intermetallic compounds is controlled by controlling the homogenization treatment temperature and the hot rolling start temperature. It is important to control When an electrolytic surface roughening treatment is applied to the obtained aluminum alloy plate, no unetched portion is generated even in a short time treatment, and the rough surface is uniform. (1) Next, the reasons for adding the components and the reasons for limiting the composition of the present invention will be described.

Fe: 0.20 to 0.6% by weight Fe is a main component of a pure aluminum-based alloy. F
e is an element forming an Al-Fe intermetallic compound in an aluminum alloy. Fe is effective in maintaining the mechanical strength by refining the recrystallized grains and making the structure uniform. Further, Fe acts as a starting point of initial pits during electrolytic surface roughening. However, when the Fe content is 0.2
If it is less than 0% by weight, the intermetallic compound is insufficient, and the ability to form initial pits during electrolytic surface roughening is insufficient. Also,
If the Fe content exceeds 0.6% by weight, the roughened electrolytic surface becomes non-uniform due to the formation of a coarse compound.

Si: 0.03% to 0.15% by weight Si forms an Al—Fe—Si based intermetallic compound to promote the formation of initial pits and to improve pit uniformity. If the Si content is less than 0.03% by weight, the formation of initial pits becomes insufficient because of insufficient intermetallic compounds. On the other hand, if the Si content exceeds 0.15% by weight, a coarse compound is formed, and the electrolytically roughened surface becomes non-uniform. Therefore, the Si content is 0.03 to 0.3.
15% by weight.

Ti: 0.005 to 0.05% by weight Ti is an element for refining the cast structure. If the Ti content is less than 0.005% by weight, the refining effect becomes insufficient,
It also has an adverse effect on the uniformity of the rough surface. On the other hand, if the Ti content is more than 0.05% by weight, the effect of fineness due to the Ti content is saturated, and in addition to being wasteful, a coarse compound is formed, and non-uniformity occurs during electrolytic surface roughening treatment. Pits are easily generated. Therefore, the Ti content is 0.1.
005 to 0.05% by weight.

Ni: 0.005 to 0.20% by weight Ni improves the chemical solubility of the aluminum alloy plate,
It is an element that has the effect of improving the etching properties of the electrification roughening. Ni is Al-F in an aluminum alloy.
An e-Ni-based intermetallic compound is formed. This compound further increases the potential difference from the aluminum matrix as compared with the Al-Fe-based compound, further promotes the formation of initial pits by electrolytic surface roughening, and is uniform in a single time. It is possible to form a rough surface.

However, if the Ni content is less than 0.005% by weight, both the improvement in chemical solubility and the ability to form initial pits are insufficient. On the other hand, if the addition amount exceeds 0.20% by weight, chemical dissolution is excessively promoted, so that the uniformity of pits on the roughened electrolytic surface is impaired. Therefore, the Ni content is set to 0.005 to 0.20% by weight.

Gold having a particle diameter of 1 to 10 μm existing on the surface
Intergeneric compound: 1000 to 8000 / mm ² As described above, the intermetallic compound acts as a starting point of the initial pit, and has a great effect on the etching property and the uniformity of the rough surface. In particular, the effect of the intermetallic compound having a particle diameter of 1 to 10 μm existing on the surface is extremely large. The surface in the present invention refers to not only the surface of a rolled plate but also the surface that has appeared by mechanical polishing and chemical polishing (including pretreatment with an alkali), that is, the surface that has been subjected to a surface roughening treatment. Includes

The particle diameter on the surface is 1 to 10 μm
The reason for limiting the number of m intermetallic compounds will be described.
If the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface is less than 1000 / mm ^{2, the} number of starting points of initial pits is insufficient, and the etching property and the uniformity of roughening are poor. On the other hand, the number of such intermetallic compounds is 8000 / m
Beyond m ^2, tends coarse pits are formed,
The uniformity of the rough surface is impaired. Therefore, the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface is 100
0 to 8000 / mm ² .

Metal having a particle diameter of 1 to 5 μm existing on the surface
Ratio of the number of inter-compounds: particle diameter 1 to 10 present on the surface
80% or more of the number of intermetallic compounds having a particle diameter of 1 μm As described above , intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface are particularly excellent in etching properties and rough surface uniformity. It is. In addition, the uniformity of the rough surface is further improved by allowing the intermetallic compound having a particle diameter of 1 to 5 μm existing on the surface to be present at a fixed ratio to the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface. It can be further improved.

The ratio of the number of intermetallic compounds having a particle diameter of 1 to 5 μm existing on the surface is determined by the particle diameter of 1 to 1 existing on the surface.
If it is less than 80% of the number of intermetallic compounds of 0 μm, the uniformity of the rough surface is deteriorated. Therefore, the ratio of the number of intermetallic compounds having a particle diameter of 1 to 5 μm existing on the surface is set to 80% or more of the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface.

Next, a method for producing an aluminum alloy plate for a printing plate according to the present invention will be described. In the manufacturing conditions of the aluminum alloy plate for a printing plate in the present invention, in addition to using the alloy ingot having the above-described chemical components, the homogenization treatment temperature and the hot rolling start temperature are controlled, and the intermetallic compound It is necessary to control the number.

Hereinafter, the reasons for limiting the numerical values of the homogenization treatment temperature and the hot rolling start temperature in the method for producing an aluminum alloy plate for a printing plate according to the present invention will be described.

Homogenization temperature: 500 to 630 ° C. When an aluminum alloy plate for a printing plate is manufactured from an aluminum alloy ingot by rolling or the like, it is necessary to homogenize the ingot at a predetermined temperature before rolling. is necessary. By this homogenization treatment, an intermetallic compound is precipitated, and the precipitated compound acts as initial pits, whereby a uniform electrolytic rough surface can be obtained. When the homogenization treatment temperature is lower than 500 ° C., the homogenization is insufficient, and the uniformity of the electrolytic rough surface is impaired because the amount of the precipitated intermetallic compound is too large. On the other hand, when the homogenization treatment exceeds 630 ° C., the precipitation amount of the intermetallic compound becomes too small, the initial pits become insufficient, the unetched portion increases, and the uniformity of the rough surface is impaired. Therefore, the homogenization temperature is set to 500 to 630 ° C.

Hot rolling start temperature: 400 to 450 ° C. After the above homogenization treatment, the aluminum alloy ingot is subjected to hot rolling at a predetermined starting temperature. Hot rolling start temperature is 400
If the temperature is lower than ℃, dynamic recrystallization during rolling is insufficient, and the crystal structure of the rolled sheet becomes non-uniform. Further, the precipitation amount of the intermetallic compound becomes too small, the initial pits become insufficient, and an unetched portion is increased at the time of electrolytic surface roughening, and the uniformity of the rough surface is impaired. On the other hand, the hot rolling start temperature is 450
If the temperature exceeds ℃, in addition to excessive growth of crystal grains between passes of hot rolling, the amount of precipitation of intermetallic compounds becomes too large, and the uniformity of the electrolytic rough surface is impaired.
Therefore, the precipitation amount of the intermetallic compound becomes too large, and the uniformity of the electrolytic rough surface is impaired. Therefore, the hot rolling start temperature is set to 400 to 450 ° C.

[0026]

EXAMPLES Examples of the present invention will be described below in comparison with comparative examples that depart from the scope of the claims.

First Example An ingot of each aluminum alloy (Examples 1 to 7 and Comparative Examples 1 to 8) having the chemical composition shown in Table 1 below was face-polished to a thickness of 470 mm and a temperature of 590 ° C. The steel is subjected to a homogenization treatment at a temperature of 4 hours, and then hot-rolled with the starting temperature set at 450 ° C., and further subjected to cold rolling, intermediate annealing and cold rolling in order to obtain an aluminum sheet having a thickness of 0.3 mm. An alloy plate was obtained. The chemical composition of each aluminum alloy plate was measured using emission spectroscopy. In addition, the particle diameters 1 to 1 existing on the surface
The number of 0 μm intermetallic compounds was determined by observing a reflected electron beam image of the surface at a magnification of 500 times using a scanning electron microscope.
25 field-of-view photographs were taken so that the area of the field of view became 0.04 mm ^2, and the number thereof was counted from the obtained photograph by image analysis. Here, the surface observation with an electron microscope was performed on both the surface of the rolled plate and the surface after dissolving the rolled plate in a 10% aqueous solution of sodium hydroxide at 40 ° C. for 10 seconds. Since the numerical values are shown, the numerical values on the surface of the rolled sheet were used as representative values.

Next, each of the aluminum alloy sheets manufactured as described above was subjected to degreasing and neutralization cleaning under the processing conditions 1 or 2 shown in Table 2 below, and then subjected to AC electrolytic surface roughening treatment. Further, a desmut treatment for removing oxides and the like formed by electrolysis was performed. After the end of this desmutting process,
Each aluminum alloy plate was washed with water and dried, cut into a certain size, and used as a material to be provided.

The etching properties and uniformity of each test material were evaluated by the following tests.

Evaluation of etching properties The roughened surface of each test material was measured using a scanning electron microscope.
Observation of the surface at a magnification of 350 times, the area of the visual field is 0.02 m
The photograph was taken in such a way that m ^2. From the obtained photos,
The unetched rate was calculated from the following equation (1).

[0031]

## EQU1 ## Unetching rate (%) = {(area of non-roughened part) / (overall area)} × 100 From the calculation result, the etching property was evaluated based on the following criteria.

[0032]

Evaluation of uniformity The roughened surface of each test material was measured using a scanning electron microscope for 5 minutes.
The surface was observed at a magnification of 00 and photographed. A line having a total length of 100 cm was drawn on the obtained observation photograph, and the size (diameter) of the pit below the line was measured. Based on the size difference between the smallest pit and the largest pit, uniformity was evaluated according to the following criteria.

[0034]

Table 1 shows the evaluation of the etching property and the uniformity of each material of the first embodiment. In each example and comparative example, each evaluation under processing condition 1 and processing condition 2
All of the evaluations were the same.

[0036]

[Table 1]

[0037]

[Table 2]

Second Example An ingot of each aluminum alloy having the chemical composition shown in Table 3 below (Examples 1 to 5 and Comparative Examples 1 to 10) was used in the same manner as in the first example. An alloy plate was obtained. The chemical composition of each aluminum alloy plate and the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface were measured in the same manner as in the first example.

Next, each of the aluminum alloy sheets manufactured as described above was subjected to degreasing and neutralization cleaning under the processing conditions 1 or 2 shown in Table 2 above, and then subjected to AC electrolytic surface roughening treatment. Further, a desmut treatment for removing oxides and the like formed by electrolysis was performed. After the end of this desmutting process,
Each aluminum alloy plate was washed with water and dried, cut into a certain size, and used as a test material.

First, the etching property and uniformity of each test material were determined.
Evaluation was performed in the same manner as in the examples. Table 4 below shows the evaluation of the etching properties and uniformity of each material of the second embodiment. In each example and comparative example, each evaluation under processing condition 1 and each evaluation under processing condition 2 were the same.

[0041]

[Table 3]

[0042]

[Table 4]

Third Example Aluminum ingots (Examples 1 to 9 and Comparative Examples 1 and 2) having the chemical structures shown in Table 5 below were used to produce aluminum in the same manner as in the first example. An alloy plate was obtained. The composition of each aluminum alloy plate was measured by the same method as in the first embodiment. Further, the number of intermetallic compounds present on the surface was observed and photographed in the same manner as in the first example, and then, by image analysis, both intermetallic compounds having a particle diameter of 1 to 5 μm and a particle diameter of 5 to 10 μm were obtained. The number was counted, and the number was used to calculate the number of intermetallic compounds having a particle diameter of 1 to 10 μm and the ratio of the number of intermetallic compounds having a particle diameter of 1 to 5 μm to them.

Next, each aluminum alloy plate manufactured as described above was subjected to degreasing and neutralization cleaning under the processing conditions 1 or 2 shown in Table 2 above, and then subjected to AC electrolytic surface roughening treatment. Further, a desmut treatment for removing oxides and the like formed by electrolysis was performed. After the end of this desmutting process,
Each aluminum alloy plate was washed with water and dried, cut into a certain size, and used as a test material.

The etching property and uniformity of each test material were determined as follows:
Evaluation was performed in the same manner as in the examples. Table 6 below shows the evaluation results of the etching property and the uniformity of each material of the third example. In each example and comparative example, processing conditions 1
And the respective evaluations under processing condition 2 were the same.

[0046]

[Table 5]

[0047]

[Table 6]

Fourth Embodiment Each of the aluminum alloy ingots having the same chemical composition as in Example 1 shown in Table 1 was beveled to a thickness of 470 mm, and then homogenized under the conditions shown in Table 7 below. The aluminum alloy sheet having a thickness of 0.3 mm was obtained by performing treatment, hot rolling, and further cold rolling, intermediate annealing and cold rolling. The chemical composition of each aluminum alloy plate and the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface were measured in the same manner as in the first embodiment.

Next, each of the aluminum alloy plates manufactured as described above was subjected to degreasing and neutralization cleaning under the processing conditions 1 or 2 shown in Table 2 above, and then subjected to AC electrolytic surface roughening treatment. And a desmutting treatment for removing oxides and the like formed by electrolysis. After completion of the desmutting treatment, each aluminum alloy plate was washed with water and dried, cut to a certain size, and used as a test material.

The etching property and uniformity of each test material were determined as follows:
Evaluation was performed in the same manner as in the examples. Table 7 below shows the evaluation of the etching property and uniformity of each material of the fourth example. In each example and comparative example, each evaluation under processing condition 1 and each evaluation under processing condition 2 were the same.

[0051]

[Table 7]

Fifth Embodiment Each of the aluminum alloy ingots having the same chemical composition as in Example 1 shown in Table 3 above was chamfered to a thickness of 470 mm, and then homogenized under the conditions shown in Table 8 below. The aluminum alloy sheet having a thickness of 0.3 mm was obtained by performing treatment, hot rolling, and further cold rolling, intermediate annealing and cold rolling. The chemical composition of each aluminum alloy plate and the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface were measured in the same manner as in the first embodiment.

Next, each of the aluminum alloy plates manufactured as described above was subjected to degreasing and neutralization cleaning under the processing conditions 1 or 2 shown in Table 2 above, and then subjected to AC electrolytic surface roughening treatment. Further, a desmut treatment for removing oxides and the like formed by electrolysis was performed. After the end of this desmutting process,
Each aluminum alloy plate was washed with water and dried, cut to a certain size, and used as a test material.

The etching property and uniformity of each test material were determined as follows:
Evaluation was performed in the same manner as in the examples. Table 8 below shows the evaluation of the materials of the fifth embodiment with respect to the etching property and the uniformity.
In each example and comparative example, each evaluation under processing condition 1 and each evaluation under processing condition 2 were the same.

[0055]

[Table 8]

[0056]

As described above, in the aluminum alloy plate for a printing plate according to the present invention, in addition to a predetermined chemical component, a surface is provided with a predetermined number of intermetallic compounds having a particle diameter of 1 to 10 μm. The pits are uniformly formed on the rough electrolytic surface, and the size of each pit is substantially constant.

In the method for producing an aluminum alloy plate for a printing plate according to the present invention, an aluminum alloy ingot having a predetermined chemical composition is subjected to homogenization treatment and hot rolling under predetermined conditions, so that a particle size of 1 It is possible to obtain an aluminum alloy plate for a printing plate in which the number of intermetallic compounds of from 10 to 10 μm is present in a predetermined amount, the roughened pits are uniformly formed on the rough electrolytic surface, and the size of each pit is substantially constant. .

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C22F 1/00 682 C22F 1/00 682 683 683 691 691B

Claims (6)

[Claims] 1. Fe: 0.20 to 0.6% by weight, S
i: 0.03 to 0.15% by weight and Ti: 0.005
And 0.05% by weight, with the balance having a composition consisting of Al and unavoidable impurities, and a part or all of the elements form an intermetallic compound. An aluminum alloy plate for a printing plate, wherein the number of intermetallic compounds having a particle size of 1 to 10 μm is 1000 to 8000 / mm ² . 2. Fe: 0.20 to 0.6% by weight, S
i: 0.03 to 0.15% by weight, Ti: 0.005 to 0.05% by weight, and Ni: 0.005 to 0.20% by weight, with the balance being Al and unavoidable impurities. A part or all of the elements form an intermetallic compound, and among the intermetallic compounds, 1000 of the intermetallic compounds having a particle diameter of 1 to 10 μm on the surface are present.
An aluminum alloy plate for a printing plate, wherein the number is 8000 / mm ² . 3. The method according to claim 1, wherein the ratio of the number of intermetallic compounds having a particle diameter of 1 to 5 μm existing on the surface is 80% or more of the number of intermetallic compounds having a particle diameter of 1 to 10 μm existing on the surface. 3. The aluminum alloy plate for a printing plate according to 1 or 2. 4. Fe: 0.20 to 0.6% by weight, S
i: 0.03 to 0.15% by weight and Ti: 0.005
To 0.05% by weight, with the balance being 500 to 6%
A step of homogenizing at a temperature of 30 ° C., and then a step of hot rolling at a starting temperature of 400 to 450 ° C., whereby 1000 to 8000 intermetallic compounds having a particle diameter of 1 to 10 μm are formed on the surface. A method for producing an aluminum alloy plate for a printing plate, comprising obtaining an aluminum alloy plate for a printing plate having a thickness of ² mm2. 5. Fe: 0.20 to 0.6% by weight, S
i: an aluminum alloy containing 0.03 to 0.15% by weight, Ti: 0.005 to 0.05% by weight, and Ni: 0.005 to 0.20% by weight, with the balance being Al and unavoidable impurities Subjecting the ingot to a homogenization treatment at a temperature of 500 to 630 ° C., and then to a starting temperature of 400 to 4
Hot rolling at 50 ° C. to obtain an aluminum alloy plate for a printing plate having 1000 to 8000 particles / mm ² of intermetallic compound having a particle diameter of 1 to 10 μm deposited on the surface. Manufacturing method of aluminum alloy plate for plate. 6. The production of an aluminum alloy plate for a printing plate according to claim 4, further comprising a cold rolling step, an intermediate annealing step, and a final cold rolling step after the hot rolling step. Method.