CN108621534A - Network detecting method is hit before the plate-making of different resolution mixed printing - Google Patents

Abstract

Network detecting method is hit before making a plate the invention discloses a kind of different resolution mixed printing, including：A, design original text is carried out RIP processing twice at varying resolutions, obtains the first RIP output file packets with first resolution feature, and the 2nd RIP output file packets with second resolution feature respectively；The design original text requires CMYK to be printed with first resolution in printing, and background color uses spot color, is printed with second resolution；B, it selects the spot color RIP output files in the CMYK colors RIP output files and the 2nd RIP output file packets in the first RIP output file packets to form the 3rd RIP output file packets to merge；C, digital sample printing is carried out with the 3rd RIP output files packet, whether the digital sample of observation, which has, is hit net phenomenon.The present invention can realize by digital sample printing mode detect different resolution mixed printing whether can exist hit net phenomenon.

Description

Network detecting method is hit before the plate-making of different resolution mixed printing

Technical field

The invention belongs to printing technologies, and network detecting method is hit before being related to the plate-making of different resolution mixed printing.

Background technology

It is as follows using screen angle before flexo product print in one practical printing：CMYK takes flexo routine screening angle Degree：C：67.5 °, M：37.5 °, Y：82.5 °, K：7.5°；Purple bottom (using spot color purple as background color) and the same angles of K：7.5 °, plate-making Line number 100L.It takes true site to simulate common CDI plate-making output accuracies 2540dpi outputs, prints digital original mold and intend flexo printing Site is all normal without net is hit, and digital sample is as shown in Figure 1.

Above-mentioned number sample exports (C with 2540dpi resolution ratio：67.5 °, M：37.5 °, Y：82.5 °, K：7.5 °, purple bottom： 7.5 °) true site no problem；But in practical printing sample feedback the blending region at CMYK and purple bottom have moire hit net net spend it is existing As shown in Figure 2 and Figure 3.Why such situation will appear

Those skilled in the art knows that mainstream flexible print plate plate-making at present is divided into traditional common CDI, the plate-making of flat-top screening simultaneously The mode deposited, wherein：

1, common CDI plate-making output accuracy is 2540dpi；

2, Kodak's flat-top plate-making physics screening output accuracy is 2400dpi；

3, esko flat-tops print front end screening output accuracy is 4000dpi；

4, rubber boat physics screening output accuracy is 5080dpi.

In above-mentioned printing sample, CMYK takes 2540dpi commonly rich woods special edition of a book material screening plate-making using common CDI, and special Purple net individually takes Du Pont P+ flat-top 4000dpi resolution ratio to make a plate, and after the rip plate-making files of verification plate-making factory, just demonstrate,proves It is real：Occur in practical printing it is above hit net moire phenomenon be due to different plate-making output resolution ratio 2540dpi, The mixed generations of 4000dpi.But existing digital sample is to be exported using same precision, therefore can not detect to hit net now As.

Invention content

Net detection side is hit before making a plate technical problem to be solved by the invention is to provide a kind of different resolution mixed printing Method, whether this method can detect different resolution mixed printing by digital sample printing mode can be in the presence of net phenomenon be hit, to overcome now Have insufficient existing for technology.

In order to solve the above technical problems, the present invention adopts the following technical scheme that：

Network detecting method is hit before a kind of plate-making of different resolution mixed printing, it is characterised in that：

A, design original text is carried out RIP processing twice at varying resolutions, is obtained respectively with first resolution feature First RIP output file packets, and the 2nd RIP output file packets with second resolution feature；The design original text is printing Shi Yaoqiu CMYK are printed with first resolution, and background color uses spot color, is printed with second resolution；

It B, will be special in the CMYK colors RIP output files and the 2nd RIP output file packets in the first RIP output file packets Color RIP output files select to form the 3rd RIP output file packets to merge；

C, digital sample printing is carried out with the 3rd RIP output files packet, whether the digital sample of observation, which has, is hit net phenomenon.

Using above-mentioned technical proposal, the present invention can be realized detects different resolution mixed printing by digital sample printing mode Whether can exist and hit net phenomenon, hit net problem so as to judge whether printed matter has in advance with extremely low cost, avoid The generation of defect ware is conducive to the quality for improving printing.

Description of the drawings

Fig. 1 is the digital sample obtained by the digital printing of the prior art；

Fig. 2 is by printing the printing sample obtained；

Fig. 3 is the close-up schematic view for printing sample；

Fig. 4 is that RIP outputs are selection resolution ratio schematic diagrames；

Fig. 5 is that the first RIP output file packets include colors RIP output file schematic diagrames；

Fig. 6 is that the 2nd RIP output file packets include colors RIP output file schematic diagrames；

Fig. 7 is that the 3rd RIP output file packets include colors RIP output file schematic diagrames；

Fig. 8 is the digital sample that method through the invention obtains.

Specific implementation mode

It is also as follows using screen angle before the design original text print of the present embodiment：CMYK takes flexo routine screen angle：C： 67.5 °, M：37.5 °, Y：82.5 °, K：7.5°；Purple bottom (using spot color purple as background color) and the same angles of K：7.5 °, line number of making a plate 100L。

RIP processing twice is carried out to the design original text, the resolution ratio of first time RIP processing is 2540dpi, obtains the first RIP Output file packet；The resolution ratio of second of RIP processing is 4000dpi, obtains the 2nd RIP output file packets.

The CMYK colors RIP output files (resolution ratio 2540dpi) of first RIP output file packets and the 2nd RIP is defeated Go out purple bottom RIP output files (resolution ratio 4000dpi) in file packet to select, is put into a new file packet and is merged into 3rd RIP output file packets.

Digital sample printing is carried out with the 3rd RIP output files packet, whether the digital sample of observation, which has, is hit net phenomenon.As shown in figure 8, The number sample also occurs hitting net phenomenon in Mixed Zone.

Pass through detailed description, it can be seen that the present invention can realize that detecting different resolution by digital sample printing mode mixes It closes printing and whether can exist and hits net phenomenon, hit net so as to judge whether printed matter has in advance with extremely low cost and ask Topic, avoids the generation of defect ware, is conducive to the quality for improving printing.

But those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate this Invention, and be not used as limitation of the invention, as long as in the spirit of the present invention, to embodiment described above Variation, modification all will fall the present invention scope of the claims in.

Claims (1)

1. hitting network detecting method before a kind of different resolution mixed printing plate-making, it is characterised in that：

A, design original text is carried out RIP processing twice at varying resolutions, obtains first with first resolution feature respectively RIP output file packets, and the 2nd RIP output file packets with second resolution feature；The design original text is wanted in printing CMYK is asked to be printed with first resolution, background color uses spot color, is printed with second resolution；

B, by the spot color in the CMYK colors RIP output files and the 2nd RIP output file packets in the first RIP output file packets RIP output files select to form the 3rd RIP output file packets to merge；

C, digital sample printing is carried out with the 3rd RIP output files packet, whether the digital sample of observation, which has, is hit net phenomenon.