CN104943358B - The characteristic generation method of printing machine and generating means - Google Patents

Abstract

The present invention provides a method for generating a characteristic curve of a printing machine and a device for generating a characteristic curve of a printing machine. The method for generating the characteristic curve of a printing machine includes: making a triangular area to be printed that runs through the entire layout; The maximum printing format and the width of a single ink zone divide the triangular area into multiple ink zones, and set the ink key value of each ink zone in the multiple ink zones respectively; according to the ink key of each ink zone value, printing the triangular area; counting the dot percentage in each ink zone; making the printing press according to the ink key value of each ink zone and the dot percentage in each ink zone characteristic curve. Through the technical scheme of the present invention, the characteristic curve of the printing machine can be obtained conveniently, and then when printing, preset ink filling is realized, the time for printing is reduced, and the amount of paper used for printing is reduced, and the printing time is improved. efficiency and cost savings.

Description

Method and device for generating characteristic curve of printing machine

technical field

The invention relates to the technical field of printing machines, in particular to a method for generating characteristic curves of printing machines and a device for generating characteristic curves of printing machines.

Background technique

At present, in the printing industry, the technical level of the printing machine pilot is relatively high. The printing machine pilot not only needs to be able to operate the printing machine, but also needs to have the ability to judge the dot coverage and color. Among them, the judgment result of the color affects the amount of ink released on the printing machine. Experienced pilots can accurately grasp the amount of ink released, which not only improves the printing efficiency but also reduces the use of overprint paper during printing, saving money. printing costs. However, the ability to judge dot coverage and color requires long-term experience accumulation. In order to solve the problem of lack of pilot experience faced by printing factories, the related technology proposes to control the amount of ink released by the printing machine through the printing source ink preset system.

However, for different printing models, different printing materials and different printing environments, the ink source ink system needs to have different data results, and the most critical thing in the data collection process is to determine the status of the printing machine, that is, to determine the printing machine status. characteristic curve, but no effective technical solution has been proposed in the related art to determine the characteristic curve of the printing press.

Therefore, how to conveniently and effectively obtain the characteristic curve of the printing machine has become an urgent technical problem to be solved.

Contents of the invention

The present invention is based on at least one of the above-mentioned technical problems, and proposes a new generation technology of the characteristic curve of the printing machine, which can conveniently make the characteristic curve of the printing machine, and then realizes preset ink filling during printing, reducing It shortens the printing time and the usage of printing paper, improves the printing efficiency and saves the cost.

In view of this, according to one aspect of the present invention, a method for generating a printing machine characteristic curve is proposed, including: making a triangular area to be printed throughout the entire layout; The triangular area is divided into a plurality of ink areas, and the ink key value of each ink area in the plurality of ink areas is respectively set; according to the ink key value of each ink area, the triangular area is printed; statistics The dot percentage in each ink zone; making the characteristic curve of the printing machine according to the ink key value of each ink zone and the dot percentage in each ink zone.

In this technical scheme, by making statistics on the percentage of dots in each ink area, and making the characteristic curve of the printing machine according to the ink key value of each ink area and the percentage of dots in each ink area, it is convenient to make printing According to the characteristic curve of the machine, and then when printing, it realizes pre-inking, which reduces the printing time and the usage of printing paper, improves the printing efficiency and saves the cost. Among them, when making the characteristic curve of the printing machine, the dot percentage can be used as the input value node, and the ink key value can be used as the output value node to draw the characteristic curve of the printing machine.

In the above technical solution, preferably, the triangular area is a wedge shape.

In this technical solution, specifically, the layout is usually rectangular, so the diagonal of the rectangular layout and the two sides of the layout can form the above-mentioned triangular area, that is, a wedge shape (rising wedge or falling wedge).

In the above technical solution, preferably, before printing the triangular area, it also includes: filling the CMYK four-color flat screen with a preset dot value in the triangular area; after filling the CMYK four-color flat screen Offline direct-to-plate-making is performed on the layout where the triangle area is located.

In this technical scheme, due to printing, there are usually C (Cyan, cyan), M (Magenta, magenta), Y (Yellow, yellow), K (Key Plate, a printing plate using black ink) four Therefore, in order to obtain a complete characteristic curve of the printing machine, a four-color flat screen with a preset dot value (such as 75%) can be filled in the above-mentioned triangular area, so that the characteristics of the printing machine can be made separately for each color group curve.

In the above technical solution, preferably, the step of counting the percentage of dots in each ink area is specifically: in each ink area, respectively counting the dots of each color group in the four CMYK color groups Percentage; the step of making the characteristic curve of the printing machine according to the ink key value of each ink area and the dot percentage in each ink area is specifically: according to the ink key of each ink area value and the dot percentage of each color group in each ink zone, and make a characteristic curve of the printing machine corresponding to each color group.

In this technical solution, the dot percentage of each color group in CMYK can be counted separately, so as to prepare the characteristic curve of the printing machine corresponding to each color group.

In the above technical solution, preferably, it also includes: printing the test job according to the characteristic curve of the printing machine; after the printing of the test job is completed, according to the corresponding The actual ink key value is optimized for the characteristic curve of the printing press.

In this technical solution, by optimizing the characteristic curve of the printing machine, a more accurate characteristic curve of the printing machine can be obtained, so that during printing, the ink discharge amount of the printing machine can be accurately controlled according to the characteristic curve of the printing machine.

According to another aspect of the present invention, a device for generating a characteristic curve of a printing machine is also proposed, including: a layout making unit for making a triangular area to be printed that runs through the entire layout; The maximum printing format and the width of a single ink zone divide the triangular area into a plurality of ink zones, and set the ink key value of each ink zone in the multiple ink zones respectively; the printing unit is used for according to each The ink key value of the ink area is used to print the triangular area; the dot statistics unit is used to count the dot percentage in each ink area; the processing unit is used to calculate the ink key value of each ink area and The dot percentages in each ink zone create a characteristic curve for the printing press.

In this technical scheme, by making statistics on the percentage of dots in each ink area, and making the characteristic curve of the printing machine according to the ink key value of each ink area and the percentage of dots in each ink area, it is convenient to make printing According to the characteristic curve of the machine, and then when printing, it realizes pre-inking, which reduces the printing time and the usage of printing paper, improves the printing efficiency and saves the cost. Among them, when making the characteristic curve of the printing machine, the dot percentage can be used as the input value node, and the ink key value can be used as the output value node to draw the characteristic curve of the printing machine.

In the above technical solution, preferably, the triangular area created by the layout making unit is a wedge shape.

In this technical solution, specifically, the layout is usually rectangular, so the diagonal of the rectangular layout and the two sides of the layout can form the above-mentioned triangular area, that is, a wedge shape (rising wedge or falling wedge).

In the above technical solution, preferably, the layout making unit is further configured to: before the printing unit prints the triangular area, fill the triangular area with a CMYK four-color flat screen with a preset dot value; and Offline direct plate-making is performed on the layout where the triangular area after filling the CMYK four-color flat screen is located.

In this technical scheme, due to printing, there are usually C (Cyan, cyan), M (Magenta, magenta), Y (Yellow, yellow), K (Key Plate, a printing plate using black ink) four Therefore, in order to obtain a complete characteristic curve of the printing machine, a four-color flat screen with a preset dot value (such as 75%) can be filled in the above-mentioned triangular area, so that the characteristics of the printing machine can be made separately for each color group curve.

In the above technical solution, preferably, the dot counting unit is specifically configured to: in each of the ink zones, respectively count the dot percentage of each color group in the four CMYK color groups; the processing unit is specifically The method is used to: prepare the characteristic curve of the printing machine corresponding to each color group according to the ink key value of each ink region and the dot percentage of each color group in each ink region.

In this technical solution, the dot percentage of each color group in CMYK can be counted separately, so as to prepare the characteristic curve of the printing machine corresponding to each color group.

In the above technical solution, preferably, the printing unit is also used to: print the test job according to the characteristic curve of the printing machine; the processing unit is also used to: print the test job in the printing unit After the job is printed, the characteristic curve of the printing machine is optimized according to the actual ink key value corresponding to each ink zone in the test job.

In this technical solution, by optimizing the characteristic curve of the printing machine, a more accurate characteristic curve of the printing machine can be obtained, so that during printing, the ink discharge amount of the printing machine can be accurately controlled according to the characteristic curve of the printing machine.

Through the above technical solution, the characteristic curve of the printing machine can be easily produced, and then when printing, preset ink filling is realized, which reduces the time for printing and the amount of paper used for printing, and improves the printing efficiency , and save costs.

Description of drawings

FIG. 1 shows a schematic flowchart of a method for generating a characteristic curve of a printing press according to an embodiment of the present invention;

Fig. 2 shows a schematic block diagram of a device for generating a characteristic curve of a printing press according to an embodiment of the present invention;

Fig. 3 shows a schematic flowchart of a method for generating a characteristic curve of a printing press according to another embodiment of the present invention;

4A to 4H show schematic diagrams of the process of a method for generating a characteristic curve of a printing machine according to an embodiment of the present invention;

5A to 5D show schematic diagrams of characteristic curves of a printing machine according to an embodiment of the present invention.

detailed description

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

FIG. 1 shows a schematic flowchart of a method for generating a characteristic curve of a printing machine according to an embodiment of the present invention.

As shown in Figure 1, the method for generating a characteristic curve of a printing press according to an embodiment of the present invention includes: Step 102, making a triangular area to be printed throughout the entire layout; Step 104, according to the maximum printing format of the printing press and a single ink The area width divides the triangular area into a plurality of ink areas, and sets the ink key value of each ink area in the plurality of ink areas respectively; step 106, according to the ink key value of each ink area, for all The triangular area is printed; step 108, counting the dot percentage in each ink area; step 110, making the printing according to the ink key value of each ink area and the dot percentage in each ink area The characteristic curve of the machine.

In this technical scheme, by making statistics on the percentage of dots in each ink area, and making the characteristic curve of the printing machine according to the ink key value of each ink area and the percentage of dots in each ink area, it is convenient to make printing According to the characteristic curve of the machine, and then when printing, it realizes pre-inking, which reduces the printing time and the usage of printing paper, improves the printing efficiency and saves the cost. Among them, when making the characteristic curve of the printing machine, the dot percentage can be used as the input value node, and the ink key value can be used as the output value node to draw the characteristic curve of the printing machine.

In the above technical solution, preferably, the triangular area is a wedge shape.

In this technical solution, specifically, the layout is usually rectangular, so the diagonal of the rectangular layout and the two sides of the layout can form the above-mentioned triangular area, that is, a wedge shape (rising wedge or falling wedge).

In the above technical solution, preferably, before printing the triangular area, it also includes: filling the CMYK four-color flat screen with a preset dot value in the triangular area; after filling the CMYK four-color flat screen Offline direct-to-plate-making is performed on the layout where the triangle area is located.

In this technical scheme, due to printing, there are usually C (Cyan, cyan), M (Magenta, magenta), Y (Yellow, yellow), K (Key Plate, a printing plate using black ink) four Therefore, in order to obtain a complete characteristic curve of the printing machine, a four-color flat screen with a preset dot value (such as 75%) can be filled in the above-mentioned triangular area, so that the characteristics of the printing machine can be made separately for each color group curve.

In the above technical solution, preferably, the step of counting the percentage of dots in each ink area is specifically: in each ink area, respectively counting the dots of each color group in the four CMYK color groups Percentage; the step of making the characteristic curve of the printing machine according to the ink key value of each ink area and the dot percentage in each ink area is specifically: according to the ink key of each ink area value and the dot percentage of each color group in each ink zone, and make a characteristic curve of the printing machine corresponding to each color group.

In this technical solution, the dot percentage of each color group in CMYK can be counted separately, so as to prepare the characteristic curve of the printing machine corresponding to each color group.

In the above technical solution, preferably, it also includes: printing the test job according to the characteristic curve of the printing machine; after the printing of the test job is completed, according to the corresponding The actual ink key value is optimized for the characteristic curve of the printing press.

In this technical solution, by optimizing the characteristic curve of the printing machine, a more accurate characteristic curve of the printing machine can be obtained, so that during printing, the ink discharge amount of the printing machine can be accurately controlled according to the characteristic curve of the printing machine.

Fig. 2 shows a schematic block diagram of a device for generating a characteristic curve of a printing press according to an embodiment of the present invention.

As shown in FIG. 2, the generating device 200 of the characteristic curve of the printing machine according to the embodiment of the present invention includes: a layout making unit 202, which is used to make a triangular area to be printed throughout the whole layout; an ink zone division unit 204, which is used to According to the maximum printing format of the printing press and the width of a single ink zone, the triangular area is divided into a plurality of ink zones, and the ink key value of each ink zone in the multiple ink zones is respectively set; the printing unit 206 is used for according to The ink key value of each ink area is used to print the triangular area; the dot counting unit 208 is used to count the dot percentage in each ink area; The ink key values of the zones and the percentage of dots in each ink zone make a characteristic curve for the printing press.

In this technical scheme, by making statistics on the percentage of dots in each ink area, and making the characteristic curve of the printing machine according to the ink key value of each ink area and the percentage of dots in each ink area, it is convenient to make printing According to the characteristic curve of the machine, and then when printing, it realizes pre-inking, which reduces the printing time and the usage of printing paper, improves the printing efficiency and saves the cost. Among them, when making the characteristic curve of the printing machine, the dot percentage can be used as the input value node, and the ink key value can be used as the output value node to draw the characteristic curve of the printing machine.

In the above technical solution, preferably, the triangular area created by the layout making unit 202 is a wedge shape.

In this technical solution, specifically, the layout is usually rectangular, so the diagonal of the rectangular layout and the two sides of the layout can form the above-mentioned triangular area, that is, a wedge shape (rising wedge or falling wedge).

In the above technical solution, preferably, the layout making unit 202 is further configured to: before the printing unit prints the triangular area, fill the triangular area with a CMYK four-color flat screen with a preset dot value; And offline direct plate-making is performed on the layout where the triangular area after filling the CMYK four-color flat screen is located.

In this technical scheme, due to printing, there are usually C (Cyan, cyan), M (Magenta, magenta), Y (Yellow, yellow), K (Key Plate, a printing plate using black ink) four Therefore, in order to obtain a complete characteristic curve of the printing machine, a four-color flat screen with a preset dot value (such as 75%) can be filled in the above-mentioned triangular area, so that the characteristics of the printing machine can be made separately for each color group curve.

In the above technical solution, preferably, the dot counting unit 208 is specifically configured to: in each ink area, respectively count the dot percentage of each color group in the four CMYK color groups; the processing unit 210 is specifically used to: prepare the characteristic curve of the printing machine corresponding to each color group according to the ink key value of each ink region and the dot percentage of each color group in each ink region.

In this technical solution, the dot percentage of each color group in CMYK can be counted separately, so as to prepare the characteristic curve of the printing machine corresponding to each color group.

In the above technical solution, preferably, the printing unit 206 is also used to: print the test job according to the characteristic curve of the printing machine; the processing unit 210 is also used to: After the test job is printed, the characteristic curve of the printing machine is optimized according to the actual ink key value corresponding to each ink zone in the test job.

In this technical solution, by optimizing the characteristic curve of the printing machine, a more accurate characteristic curve of the printing machine can be obtained, so that during printing, the ink discharge amount of the printing machine can be accurately controlled according to the characteristic curve of the printing machine.

Fig. 3 shows a schematic flowchart of a method for generating a characteristic curve of a printing press according to another embodiment of the present invention.

As shown in FIG. 3, a method for generating a characteristic curve of a printing machine according to another embodiment of the present invention includes:

Step 302, printing machine maintenance.

Specifically, the printing machine operator maintains the printing machine and updates related machine consumables, including ink keys, ink fountain tank cleaning, etc.

The printing machine is dynamically inspected, and 50% of the four-color flat screen is produced according to the maximum layout of the printing machine, and published and printed. When printing, give each unit and each ink channel the same ink key value, and check the uniformity of the left and right density of the printed product. If there is a serious density deviation, you need to adjust the state of the printing machine before testing.

In step 304, the CTP version is obtained from the printing ink status collection map.

Specifically, the following steps are included:

(1) Production of printing ink status collection documents. Make the printing ink status collection layout, which is a "wedge diagram", that is, a triangle that runs through the entire layout from left to right (printing direction of the printing machine).

(2), layout design. Determine the maximum printing format of the current printing machine and the width of a single ink zone. Take the current printing machine format as the page size of the collection picture, and mark the position of each ink area in the picture, and ensure that it corresponds to the position of the ink key on the printing machine. The “wedge” area of the layout is filled with 75% of the CMYK four colors. (or greater than 75%) for a flat screen, resulting in a wedge file.

(3), CTP plate production. First, adjust the linearization of the plate for the CTP equipment, requiring the faithful restoration of the dots, and exporting the "wedge file" to the CTP version.

Step 306, collecting ink key characteristics of the printing machine.

Specifically include the following steps:

(1), ink key value preset. Fix the printing machine speed, and determine the current fixed speed value according to the current normal speed of the printing machine table. Ink keys are preset in increments.

(2), printing. It is required to keep the speed constant during printing, and only change the ink key value, so that the solid density difference of each color group and each ink area of the printed product is controlled within ±0.05 of the standard density value from left to right.

(3) Record the actual printing ink key value. After the printing density has been controlled to be uniform, the printing can be stopped, and each ink key value corresponding to each color surface can be recorded. The ink key value recorded at this time is used as the ink key characteristic value of the current state of the printing press.

Step 308, obtaining the standard dot percentage of the wedge chart.

Specifically, the "wedge file" is output by the printing front-end output software, or the dot percentage value of the area corresponding to each ink key value is directly counted by the software that makes the "wedge file".

Step 310, generating a characteristic curve of the printing machine.

Use the dot percentage as the input value node, and use the ink key values recorded in step 306 as the output value node to obtain the characteristic curve of the printing press.

Step 312, optimize the characteristic curve of the printing machine. That is, use a special test file to optimize the printing characteristic curve through the printing process inspection. Specifically, each ink key value of the printing test file can be preset through the characteristic curve of the printing machine generated in step 310, and the printing is started, and the actual printing ink key value is recorded after the printing is stable, so as to correct the characteristic curve of the printing machine.

Through the technical solution of this embodiment, preset inking is realized, the time for printing is reduced, the amount of paper used for printing is reduced, printing efficiency is improved, costs are saved, and green printing with energy saving and emission reduction is realized concept.

The technical solution of the present invention will be described in detail below with specific embodiments and in conjunction with FIG. 4A to FIG. 4H .

The printing machine parameters are shown in Table 1:

Table 1

The paper uses Gold East Space Shuttle 157g coated paper, and takes the Founder Changliu process software and the Founder ink source ink preset special software as examples.

Among them, step 304 is specifically: making a wedge-shaped image file as shown in Figure 4A, wherein the layout size is 740×520; the layout content is a triangular CMYK four-color flat screen running through the original from left to right, and the dot value is 75%. . Divide the original plate into 23 ink areas with an ink area width of 33mm, and mark the ink area number, and make a CMYK four-color solid block in each ink area (as shown in Figure 4B, which is an enlarged schematic diagram of a wedge-shaped diagram) to test printing time uniformity.

Second, linearize the CTP publishing machine. Output the linearization test strip, as shown in Figure 4C, and measure the dot percentage after publishing, record the result to the linear part of the Founder’s smooth flow plate, publish again, and verify that the dot percentage output value remains unchanged to meet the linearity requirement. to publish.

Step 306 is specifically:

Predetermine the "ink roller speed" of all color groups of the printing machine to be 35, and preset the ink key value on the machine according to the wedge-shaped trend, and print the CTP plate of the wedge-shaped file in step 304 on the printing machine. The solid density of each color plate is given during printing, and K1.85, C1.60, M1.5, and Y1.05 are given in this embodiment. During printing, the solid density difference of each ink area of each color group is controlled within ±0.05 of the standard density value by adjusting the ink key value.

When the printing density is uniformly controlled, the printing can be stopped, and the ink key value of each ink zone corresponding to each color group can be counted, as shown in FIG. 4D .

Step 308 is specifically:

When publishing the wedge-shaped file, it is necessary to carry out the PDF linking in the Founder Changliu process software, and select "Generate the special ink file for Founder's printing source" to generate "Wedge-shaped file.ink".

Set the printing machine template in the Founder Yinyuan software, where the printing plate format, the number of ink keys, and the coarse and fine adjustments are set according to the actual printing machine. The setting interface in this embodiment is shown in Figure 4E.

In the special ink preset software of Founder Printing Source, use the set printer attribute template to analyze the "wedge file.ink" generated by Founder Changliu process software. Output the wedge chart data to obtain the standard dot percentage data of the wedge chart.

Step 310 is specifically:

On the printing machine characteristic curve generation interface of Founder Printing Ink Presetting Software, you need to select the "wedge-shaped dot percentage data" generated in step 308 according to different color rollers, and enter the percentage corresponding to the standard dots of each ink key The ink key value recorded when printing the wedge-shaped file in step 306.

Specifically, as shown in FIG. 4G , take the input of ink key data of the K version as an example. After the input is completed, the characteristic curve of the printing machine can be generated by software, and the curve can be optimized by node optimization to obtain the characteristic curve as shown in Figure 4H. Similarly, the characteristic curves of printing presses for C, M, and Y color groups can be obtained.

Step 312 is specifically:

Printing characteristic curves are optimized through printing process inspection with dedicated test files. Specifically, each ink key value of the printing test file can be preset through the characteristic curve of the printing machine generated in step 310, and the printing is started, and the actual printing ink key value is recorded after the printing is stable, so as to correct the characteristic curve of the printing machine. The correction results are shown in Table 2:

Table 2

Optimize the characteristic curve of the printing press according to the correction results of the ink key value in Table 2, as shown in Figure 5A, the schematic diagram of the characteristic curve of the printing press for the K color group, wherein, the curve 502 is the printing press corresponding to the optimized K color group As for the characteristic curve, the curve 504 is the characteristic curve of the printing machine corresponding to the K color group before optimization.

As shown in FIG. 5B , a schematic diagram of the characteristic curve of the printing machine for the color group C, wherein, the curve 508 is the characteristic curve of the printing machine corresponding to the color group C after optimization, and the curve 506 is the characteristic curve of the printing machine corresponding to the color group C before optimization. .

As shown in Figure 5C, a schematic diagram of the characteristic curve of the printing machine for the M color group, wherein the curve 510 is the characteristic curve of the printing machine corresponding to the optimized M color group, and the curve 512 is the characteristic curve of the printing machine corresponding to the M color group before optimization .

As shown in Figure 5D, a schematic diagram of the characteristic curve of the printing machine for the Y color group, wherein the curve 514 is the characteristic curve of the printing machine corresponding to the optimized Y color group, and the curve 516 is the characteristic curve of the printing machine corresponding to the Y color group before optimization .

After obtaining the characteristic curve of the printing machine, if the printing operation is required, the actual ink discharge amount can be determined through the characteristic curve of the printing machine, which reduces the printing time and the usage of the printing paper, and improves the printing efficiency , and save costs.

The technical solution of the present invention has been described in detail above in conjunction with the accompanying drawings, considering that no effective technical solution has been proposed in the related art to determine the characteristic curve of the printing machine. Therefore, the present invention proposes a new generation technology of the characteristic curve of the printing machine, which can conveniently make the characteristic curve of the printing machine, and then when printing, it realizes pre-inking, reduces the time for printing and the printing time. The use of overprinted paper improves printing efficiency and saves costs.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A method for generating a printing press characteristic curve, comprising: Make a triangular area to be printed that runs through the entire layout; According to the maximum printing format of the printing press and the width of a single ink zone, the triangular area is divided into a plurality of ink zones, and the ink key value of each ink zone in the multiple ink zones is set respectively; Printing the triangular area according to the ink key value of each ink area; Count the dot percentage in each of the ink regions; A characteristic curve of the printing machine is prepared according to the ink key value of each ink area and the dot percentage in each ink area. 2. The method for generating a characteristic curve of a printing press according to claim 1, wherein the triangular area is a wedge shape. 3. The method for generating the characteristic curve of a printing machine according to claim 1, further comprising: before printing the triangular region: Fill the CMYK four-color flat screen with preset dot values in the triangle area; Offline direct plate-making is performed on the layout where the triangular area after filling the CMYK four-color flat screen is located. 4. The method for generating the characteristic curve of a printing press according to claim 3, wherein the step of counting the dot percentage in each ink zone is specifically: In each of the ink regions, count the dot percentage of each color group in the four CMYK color groups; The step of making the characteristic curve of the printing machine according to the ink key value of each ink zone and the dot percentage in each ink zone is specifically: According to the ink key value of each ink area and the dot percentage of each color group in each ink area, a characteristic curve of the printing machine corresponding to each color group is prepared. 5. The method for generating a characteristic curve of a printing press according to any one of claims 1 to 4, further comprising: Printing the test job according to the characteristic curve of the printing press; After the test job is printed, the characteristic curve of the printing machine is optimized according to the actual ink key value corresponding to each ink zone in the test job. 6. A generating device for a printing press characteristic curve, characterized in that it comprises: a layout making unit, configured to make a triangular area to be printed throughout the entire layout; An ink zone division unit is used to divide the triangular area into a plurality of ink zones according to the maximum printing format of the printing press and the width of a single ink zone, and set the ink key value of each ink zone in the multiple ink zones respectively; a printing unit, configured to print the triangular area according to the ink key value of each ink area; A network dot statistics unit, used for counting the percentage of network dots in each ink area; A processing unit, configured to create a characteristic curve of the printing machine according to the ink key value of each ink zone and the dot percentage in each ink zone. 7. The device for generating a characteristic curve of a printing press according to claim 6, wherein the triangular area created by the layout making unit is a wedge shape. 8. The generating device of the characteristic curve of the printing press according to claim 6, characterized in that, the layout making unit is also used for: Before the printing unit prints the triangular area, filling the triangular area with a CMYK four-color flat screen with a preset dot value; and Offline direct plate-making is performed on the layout where the triangular area after filling the CMYK four-color flat screen is located. 9. The generating device of the characteristic curve of printing press according to claim 8, characterized in that, the dot statistics unit is specifically used for: In each of the ink regions, count the dot percentage of each color group in the four CMYK color groups; The processing unit is specifically used for: According to the ink key value of each ink area and the dot percentage of each color group in each ink area, a characteristic curve of the printing machine corresponding to each color group is prepared. 10. The device for generating a characteristic curve of a printing press according to any one of claims 6 to 9, wherein the printing unit is also used for: Printing the test job according to the characteristic curve of the printing press; The processing unit is also used for: after the printing unit finishes printing the test job, optimize the characteristic curve of the printing machine according to the actual ink key value corresponding to each ink zone in the test job deal with.