CN111152584A - Flexo printing wide color gamut printing method, system and device - Google Patents
Flexo printing wide color gamut printing method, system and device Download PDFInfo
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- CN111152584A CN111152584A CN201911423830.4A CN201911423830A CN111152584A CN 111152584 A CN111152584 A CN 111152584A CN 201911423830 A CN201911423830 A CN 201911423830A CN 111152584 A CN111152584 A CN 111152584A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/02—Letterpress printing, e.g. book printing
- B41M1/04—Flexographic printing
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Abstract
The invention provides a flexo printing wide color gamut printing method, a system and a device, wherein the method comprises the steps of S1, establishing a wide color gamut color standard; s2, determining an ink formula; s3, carrying out linear plate making on the electronic document to be printed, establishing a printing curve, and storing the printing curve into a printing file; s4, performing proofing and sample making according to the printing files; the system comprises: the standard module is used for establishing a wide color gamut color standard; a formula module for determining an ink formula; the plate making module is used for carrying out linear plate making on the electronic document to be printed and establishing a printing curve; the calibration module is used for calibrating the printing curve; and the storage module is stored with a printing file and used for storing a printing curve. The invention expands the prepress design capability of the flexography of the offset printing item, keeps the color consistency, reduces the waste of a washing machine of the printing ink, reduces the loss of the adjustment of the production-changing printing ink, refines the production-changing time, increases the utilization rate of the production time, promotes the daily output and reduces the cost of the sample printing before the printing.
Description
Technical Field
The invention relates to the technical field of printing, in particular to a flexo printing wide color gamut printing method, system and device.
Background
The color gamut is a range area formed by the number of colors that can be expressed by a certain device, that is, a range of colors that can be expressed by various screen display devices, printers, or printing devices. Along with the popularization of utilizing digital camera and computer to carry out original manuscript input, inkjet printer's use is more and more common, present inkjet printing equipment adopts RGB color standard and CMYK mode mostly, however can appear the condition that colour distortion or contrast descend in the actual printing process, so when need print out bright in color, the books of colour saturation, adopt three-colour printing or ordinary four-colour printing to hardly reach the requirement, simultaneously because the use of special color ink in the production, need add the special color ink of new item again after washing the special color ink clean when trading list production, it is extravagant to trade every look of washing machine through statistics water ink: 2-3KG of ink, wherein each ink is 100-200 meters in loss; the traditional printing mode is CMYK + spot color design, the drawing and color separation are carried out according to the original manuscript of a customer, the actually produced sample is confirmed by the customer, the printed sample is greatly different from a computer display sample or a digital sample, the customer can often adjust the original manuscript and then sample, the order cost is increased due to the plate fee, the ink fee and the manufacturing cost, and the business opportunity is delayed for the customer. Due to the problem of limited color gamut, the original is often expressed in the form of CMYK + spot color in the stages of image mixing and color separation during design, the ink blending of the spot color is operated by technicians by visual sense, and the color cannot be subjected to standard control, so that the color consistency between batches during production is poor.
Disclosure of Invention
The invention solves the problems of color distortion, ink waste and high printing cost in the existing color printing technology, and provides a method, a system and a device for flexo printing wide color gamut printing, which expand the prepress design capability of the flexo printing of an offset product item, keep the color consistency, reduce the color change of different items, control the spot color, reduce the waste of a washing machine of ink, reduce the loss of the adjustment of the production-changing ink, refine the production-changing time, increase the production time utilization rate, improve the daily output, simultaneously simulate the similarity of digital proofing to be more than or equal to 90 percent, and reduce the prepress proofing cost.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a flexo printing wide color gamut printing method comprises the following steps:
s1, establishing a wide color gamut color standard;
s2, determining an ink formula;
s3, carrying out linear plate making on the electronic document to be printed, establishing a printing curve, and storing the printing curve into a printing file;
and S4, performing proofing and sampling according to the printing file.
The use of spot colors in production is reduced by using a wide color gamut seven-color standard, the saving along with the loss also means the saving of ink, the space for storing residual ink is refined when the use of the spot color ink is reduced, in addition, the use of additives of the ink is correspondingly reduced, and the reduction of the cost of the ink is also explained above; the wide color gamut color separation is applied to the printing original before printing, namely the color debugging is finished before printing, the color adjustment is not needed after the machine is replaced, and the ink adjusting time is statistically refined: 10-15 minutes per unit; after the wide-color-gamut expanding printing, the design before printing is subjected to image adjustment and color separation according to the standards of ink and a printing plate, which is equivalent to the adjustment operation of an analog production field before printing, and the digital proofing sample can be matched with the field printing after being confirmed by a client, so that the printing layout design efficiency is improved, and the proofing cost is reduced; the prepress design capability of the flexography of the offset printing item is expanded, the color consistency is kept, the color change of different items is reduced, the spot color control is realized, the waste of a washing machine of printing ink is reduced, the loss of the adjustment of the production-changing printing ink is reduced, the production time is refined, the production time utilization rate is increased, the daily output is improved, the analog digital proofing similarity is more than or equal to 90 percent, and the prepress proofing cost is reduced.
Preferably, the step S1 specifically includes:
the CMYK four color gamut is extended to a seven color gamut comprising CMYK four color gamut + orange + green + violet. The original CMYK four-color gamut is expanded to CMYK + O (orange) + G (green) + V (purple) seven-color gamut, and the problem that the color gamut of the prepress design is limited by a printing subtractive method is solved.
Preferably, the step S2 specifically includes: and (3) performing an ink IDD test according to an ink standard to determine the ink formula, wherein the ink standard comprises the set standard of an ink detection color difference meter: d50 illuminant/2 ° viewing angle, Δ E2000 detection standard; ink color difference standard: 100% of actual delta E is less than or equal to 2.0, and 50% of lattice points delta E is less than or equal to 3.0; lab value criteria for ink CMYKOGV.
Preferably, the step S3 specifically includes:
s301, linearly making a plate for the electronic document to be printed, judging the accuracy of the number of layers of dots, and if so, performing S302;
s302, carrying out finger print test according to the dot gain standard to obtain a plate making compensation curve;
s303, extracting a printing curve, printing a wide color gamut sample by using the printing curve, storing the wide color gamut sample into a printing file if the result reaches the standard, and correcting the parameters according to the test result and storing the parameters into the printing file if the result does not reach the standard.
The finger print test is a common technique in the field, and the printing plate is repeatedly tested to obtain a compensation value, and a compensation curve is established.
Preferably, the step S302 further includes testing a platemaking compensation curve to verify the accuracy of the platemaking compensation curve, and the dot gain criterion includes: preprinting coated paper: 25 percent of lattice points are 15 +/-4 percent, 50 percent of lattice points are 19.6 +/-5 percent, and 75 percent of lattice points are 14.5 +/-4 percent.
A flexo printing wide color gamut printing system comprising:
the standard module is used for establishing a wide color gamut color standard;
a formula module for determining an ink formula;
the plate making module is used for carrying out linear plate making on the electronic document to be printed and establishing a printing curve;
the calibration module is used for calibrating the printing curve;
and the storage module is stored with a printing file and used for storing a printing curve.
Preferably, the platemaking module further establishes a platemaking compensation curve that compensates for the printing curve.
Preferably, the calibration module further performs accuracy judgment on the platemaking compensation curve.
A flexo printing wide color gamut printing device comprises the wide color gamut printing system.
The invention has the following beneficial effects: the prepress design capability of the flexography of the offset printing item is expanded, the color consistency is kept, the color change of different items is reduced, the spot color control is realized, the waste of a washing machine of printing ink is reduced, the loss of the adjustment of the production-changing printing ink is reduced, the production time is refined, the production time utilization rate is increased, the daily output is improved, the analog digital proofing similarity is more than or equal to 90 percent, and the prepress proofing cost is reduced.
Drawings
Fig. 1 is a flowchart of the method of the present embodiment.
Detailed Description
Example (b):
the embodiment provides a flexo printing wide color gamut printing method, which, with reference to fig. 1, includes the following steps:
s1, establishing a wide color gamut color standard, specifically comprising:
the CMYK four-color gamut is extended to a seven-color gamut, which includes CMYK four-color gamut + orange + green + violet. The original CMYK four-color gamut is expanded to CMYK + O (orange) + G (green) + V (purple) seven-color gamut, and the problem that the color gamut of the prepress design is limited by a printing subtractive method is solved.
S2, determining an ink formula, which specifically comprises the following steps: and (3) performing an ink IDD test according to an ink standard to determine the ink formula, wherein the ink standard comprises the set standard of an ink detection color difference meter: d50 illuminant/2 ° viewing angle, Δ E2000 detection standard; ink color difference standard: 100% of actual delta E is less than or equal to 2.0, and 50% of lattice points delta E is less than or equal to 3.0; lab value criteria for inks CMYKOGV, see the following table:
| printing ink | L | A | B |
| K | 19.47 | 2.27 | 5.64 |
| V | 24 | 46.00 | -55.00 |
| C | 54.69 | -33.95 | -45.42 |
| G | 58.95 | -68.86 | 0.49 |
| M | 50.90 | 66.55 | -2.84 |
| O | 60.39 | 56.04 | 81.17 |
| Y | 84.54 | -6.98 | 97.16 |
S3, performing linear plate making on the electronic document to be printed, establishing a printing curve, and storing the printing curve into a printing archive, wherein the method specifically comprises the following steps:
s301, linearly making a plate for the electronic document to be printed, judging the accuracy of the number of layers of dots, and if so, performing S302;
s302, carrying out finger print test according to the dot gain standard to obtain a plate making compensation curve, and testing the plate making compensation curve to verify the accuracy of the plate making compensation curve, wherein the dot gain standard comprises: preprinting coated paper: 25 percent of lattice points are 15 +/-4 percent, 50 percent of lattice points are 19.6 +/-5 percent, and 75 percent of lattice points are 14.5 +/-4 percent.
S303, extracting a printing curve, printing a wide color gamut sample by using the printing curve, storing the wide color gamut sample into a printing file if the result reaches the standard, and correcting the parameters according to the test result and storing the parameters into the printing file if the result does not reach the standard.
And S4, performing proofing and sampling according to the printing file.
The use of spot colors in production is reduced by using a wide color gamut seven-color standard, the saving along with the loss also means the saving of ink, the space for storing residual ink is refined when the use of the spot color ink is reduced, in addition, the use of additives of the ink is correspondingly reduced, and the reduction of the cost of the ink is also explained above; the wide color gamut color separation is applied to the printing original before printing, namely the color debugging is finished before printing, the color adjustment is not needed after the machine is replaced, and the ink adjusting time is statistically refined: 10-15 minutes per unit; after the wide-color-gamut expanding printing, the design before printing is subjected to image adjustment and color separation according to the standards of ink and a printing plate, which is equivalent to the adjustment operation of an analog production field before printing, and the digital proofing sample can be matched with the field printing after being confirmed by a client, so that the printing layout design efficiency is improved, and the proofing cost is reduced; the prepress design capability of the flexography of the offset printing item is expanded, the color consistency is kept, the color change of different items is reduced, the spot color control is realized, the waste of a washing machine of printing ink is reduced, the loss of the adjustment of the production-changing printing ink is reduced, the production time is refined, the production time utilization rate is increased, the daily output is improved, the analog digital proofing similarity is more than or equal to 90 percent, and the prepress proofing cost is reduced.
The invention also provides a flexo printing wide color gamut printing system, comprising:
the standard module is used for establishing a wide color gamut color standard;
a formula module for determining an ink formula;
the plate making module is used for carrying out linear plate making on the electronic document to be printed and establishing a printing curve;
the calibration module is used for calibrating the printing curve;
and the storage module is stored with a printing file and used for storing a printing curve.
The platemaking module also establishes a platemaking compensation curve, and the platemaking compensation curve compensates the printing curve.
The calibration module also judges the accuracy of the plate making compensation curve.
The invention also provides a flexo printing wide color gamut printing device which comprises the wide color gamut printing system.
The invention has the following advantages: the prepress design capability of the flexography of the offset printing item is expanded, the color consistency is kept, the color change of different items is reduced, the spot color control is realized, the waste of a washing machine of printing ink is reduced, the loss of the adjustment of the production-changing printing ink is reduced, the production time is refined, the production time utilization rate is increased, the daily output is improved, the analog digital proofing similarity is more than or equal to 90 percent, and the prepress proofing cost is reduced.
Claims (9)
1. A flexo printing wide color gamut printing method is characterized by comprising the following steps:
s1, establishing a wide color gamut color standard;
s2, determining an ink formula;
s3, carrying out linear plate making on the electronic document to be printed, establishing a printing curve, and storing the printing curve into a printing file;
and S4, performing proofing and sampling according to the printing file.
2. The method according to claim 1, wherein the step S1 specifically comprises:
the CMYK four color gamut is extended to a seven color gamut comprising CMYK four color gamut + orange + green + violet.
3. The method according to claim 1, wherein the step S2 specifically comprises: and (3) performing an ink IDD test according to an ink standard to determine the ink formula, wherein the ink standard comprises the set standard of an ink detection color difference meter: d50 illuminant/2 ° viewing angle, Δ E2000 detection standard; ink color difference standard: 100% of actual delta E is less than or equal to 2.0, and 50% of lattice points delta E is less than or equal to 3.0; lab value criteria for ink CMYKOGV.
4. The method according to claim 1, wherein the step S3 specifically comprises:
s301, linearly making a plate for the electronic document to be printed, judging the accuracy of the number of layers of dots, and if so, performing S302;
s302, carrying out finger print test according to the dot gain standard to obtain a plate making compensation curve;
s303, extracting a printing curve, printing a wide color gamut sample by using the printing curve, storing the wide color gamut sample into a printing file if the result reaches the standard, and correcting the parameters according to the test result and storing the parameters into the printing file if the result does not reach the standard.
5. The method according to claim 4, wherein the step S302 further comprises testing a platemaking compensation curve to verify the accuracy of the platemaking compensation curve, and the dot gain criteria comprises: preprinting coated paper: 25 percent of lattice points are 15 +/-4 percent, 50 percent of lattice points are 19.6 +/-5 percent, and 75 percent of lattice points are 14.5 +/-4 percent.
6. A flexo printing wide color gamut printing system adapted to the flexo printing wide color gamut printing method according to any one of claims 1 to 5, comprising:
the standard module is used for establishing a wide color gamut color standard;
a formula module for determining an ink formula;
the plate making module is used for carrying out linear plate making on the electronic document to be printed and establishing a printing curve;
the calibration module is used for calibrating the printing curve;
and the storage module is stored with a printing file and used for storing a printing curve.
7. The flexographic wide gamut printing system according to claim 6, wherein the platemaking module further creates a platemaking compensation curve that compensates for the printing curve.
8. The flexographic wide gamut printing system according to claim 7, wherein said calibration module further determines the accuracy of the platemaking compensation curve.
9. A flexo printing wide color gamut printing device comprising the wide color gamut printing system according to any one of claims 6 to 8.
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| CN113650433A (en) * | 2021-09-03 | 2021-11-16 | 安徽紫金新材料科技股份有限公司 | Standardized color matching method for plastic film printing |
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Application publication date: 20200515 |