Don't endlessly endless revisions!
Frequent revision of the ink , the reason:
First, it is used to meet the digital requirements of high-end overseas customers; Tangshan Yuyin
The second is to respond to the customer to sample accurate color; equipment maintenance and maintenance
The third is to deal with reprinting and color reproduction. Standards and certification
In these three cases, many printing companies often need to repeatedly revisit the machine before they can barely achieve it, from one or two times, to three or four times, and some difficult work orders even more than ten times. A printing machine can only be used for frequent trial printing of commercial rotations in China for a long time or a whole day. It cannot print production orders, let alone the loss of equipment, paper, ink and labor. Renminbi
Now that the printing industry has entered the era of meager profit, the printing company owner is in the eyes and eager in the heart. How to minimize the revision caused by poor coloring has become an important issue to be solved urgently. Regional report
Based on the actual situation of the visiting printing enterprises, this paper focuses on the following cases to analyze and demonstrate over-packaging , and gives suggested solutions. Prepress equipment
Situation 1: No proof of Beiren shares
Solution: On the ordinary digital proofing system supplies
This type of enterprise is mostly a printing company that accepts processing orders. In the past, it only focused on order processing, investment printing machines began to print, and the prepress process was relatively weak. Even many companies were third-party outsourcing. Generally, only blue paper proofing (layout) printing education , there is no digital proofing (color), only the machine knows the color depth, encounter high-end work, strict color requirements, due to the lack of accurate predictability education , the printing effect on the machine It is often difficult to be willing. This is like a gamble: If you are lucky, you can follow the color by adding or subtracting the ink; if unfortunately, the revision is inevitable. unemployment
The recommended solution for this type of customer is to use the digital proofing system in the prepress process. Currently the market is more mature configuration EPSON wide-format proofer + CGS / GMG / EFI system + automatic color measuring instrument copy, and again the current EPSON SureColor series P9080 / P7080 (11-color) or P8080 / 6080 (nine Mainly, the software system is updated to support new printers, such as CGS Color Tuner Web 3.2/GMG Color Proof 5.9/EFI ColorProof 6.4, etc. Some companies need to print 1-bit-tiff color separation files. Also need to increase the Screen Dot dot proofing module. This digital proofing system generally uses original paper and original ink as the carrier for water supply/dampening. It is accurately calculated by the software 4D module cycle. After adjustment by professional engineers, with accurate automated measuring instruments (such as Xrite isis, i1iO, etc.), The average color difference between proofing and printing can be controlled to about 1 and the maximum is about 3 dairy packages , which conforms to the ISO 12647-7 standard. This is the most stable, market accepted and widely used proofing system. Book printing
It is conceivable that if the matching of digital proofing and printing color is realized, one proofing machine is equivalent to one or several printing machines, and finally there is no need to publish at the front end. It is easy to foresee the printing color Epson through digital proofing, compared to the above. Machine printing only found that the color can not be adjusted and the need to adjust the situation to take a lot of detours, the efficiency has been greatly improved, and the cost is much less. Therefore, at present, the prepress department of the general medium and large printing enterprises is equipped with at least one such system. Institution/organization
Case 2: There is already a general digital proofing publication
Solution: acquisition of packaging or digital or special proofing systems
For general book printing companies, ordinary digital proofing can basically simulate the printing color because of its common coated paper, matte paper, light coated paper and book paper. But for packaging and printing companies separations, due to its printing materials tend to be more specific, for example, often use gold and silver cardboard, film, powder gray paper, white cardboard, if the ordinary digital proofing, it is difficult to achieve the desired results . In this case, printing companies generally adopt the following different options. Carton carton
First, the choice of modified EPSON proofing machine book printing , with compatible ink, actual printing paper, this program can be quickly spread out with low cost of use, has been recognized by many small and medium-sized enterprises, becoming an entry-level choice for packaging proofing. However, its shortcomings are also very obvious. One is due to the modification of heating ink supply , and the use of non-original ink, so the color stability is not good; the second is because the direct hit on different printing paper, the probability of damage to the print nozzle is relatively higher. Currently available to these programs are non-EPSON official third-party agents. Industry regulations
The second is to choose traditional manuscripts (referred to as wet drafts in Hong Kong, China). This is a more traditional proofing method. Most of them are the status and trends of monochrome or two-color flattening and proofing machines, which can restore the printing effect to the utmost. Spot color, which is also the closest proof to the printing effect; however, because it also needs to be published on the machine, the time and cost loss is relatively the largest. As the digitization process accelerates the packaging design , this method will gradually fade out of the industry stage. development
Third, select a digital printing machine. Compared with EPSON proofers, digital presses are not only superior in terms of productivity, but also their ability to handle different types of printed paper. From toners to electronic inks, inkjets, nano-inks, new technologies for digital presses are emerging and gradually maturing. However, if you only use the multi-million-dollar production digital press award , if it is only used for pre-press proofing, it is really a chicken knife. Of course, there is a limitation. Although digital printing is known for its production capacity, the printing format is narrow. This is still a bottleneck. Special printing
The fourth is to choose UV inkjet proofing, which is also a popular technology in recent years. From the field of advertising inkjet to the traditional printing field policy and regulations , it has become a new choice for packaging proofing. Thanks to the UV-curing instant cure characteristics, UV inkjet's ability to adapt to different papers is commendable. Just because the printed product always feels concave and convex, coupled with the limited color gamut of four-color ink to simulate the spot color, and the limitations of the matching color management software, the UV inkjet device can not be said to be a perfect proof. Proofing plan. Lithography
Here you should especially recommend a secret weapon offset printing from the heart of Germany, from the German CGS ORIS Flex Pack Web, another way, unique, based on the officially recognized modified eight-color Japanese Roland proofing machine, CGS proud of 4D The color calculation is the core mechanism/organization , printed on the pre-coated transparent film with weak solvent ink, and then the thermal transfer film is applied to the printing material to break through the printability limitation of the material, which can be realized in gold and silver cardboard and film. , a series of different materials such as powder paper, iron sheet, plastic, film, etc., quickly became the new favorite of many different types of packaging and printing enterprises. Industry regulations
Case 3: proofing color is not allowed to scan
Solution: Calibrate, upgrade or replace existing proofing system beverage packaging
Many companies have equipped the digital proofing system fonts on the CTP project. After a lot of unfortunately, many digital proofing systems have not played their due role. The color of the sample can't restore the color of the file itself. The result is the same as the fake Tangshan jade seal , or have to be on the machine proofing. Imposition
The reason is that some hardware devices are too old, such as the oldest EPSON 10600/9800/9880 series, which are generally 5 to 10 years old, with many print head breaks, nozzle aging fault book printing , or Other problems, resulting in the color of the sample can not be controlled; some software system version is too low, such as EFI 4.0/CGS 1.2, many desktop publishing documents can not support, and worry about RIP interpretation results and process inconsistency; Professionals maintain solar chemistry , and lack of corresponding measuring instruments. Many companies use color templates or queues that engineers have corrected many years ago. In practice, work orders can be printed directly, even if different brands of paper are changed, or Printing accessories are also printed directly with different ink suppliers, year after year, until the proofing color deviates from the old ones and does not care. How can such a digital proofing system but also for color document itself, the final color printing press "speak" it? Policies and regulations
In this case, the solution given by the author is to follow the mainstream development trend of the industry, update the digital proofing system to the industry average policy and regulations , and eliminate the old hardware and software. It is necessary to equip with a set of manual or automatic measuring instruments ( For example, Xrite i1iO2/i1 Pro2), do daily monitoring of digital proofing color quality, and find that when the relevant data exceeds the standard, the system should be calibrated in time to reach the standard state. For example, CGS Certfied Web/GMG ProofControl/EFI Verifier can help you monitor the color stability of digital proofing. Washing product packaging
Situation 4: The proofing color is accurate and the printing is not allowed to be packaged and decorated.
Solution: Implement printing standardization and certification DTP
Such customers proofing through software calibration, proofing color deviation will be controlled within the ISO 12647-7 standard tolerances of quality control, but with less color printing but, often need revision, which is why? Ink-water balance
Digital proofing and traditional printing are two color systems that are constantly fluctuating. There is a problem with color matching between the two, and one of them has been controlled and can maintain stable ticket printing , and the other naturally needs to be controlled and stabilized. Normally, proofing has been controlled to within standard tolerances, and printing is not within the standard range, so it is conceivable that the solution is to standardize the printing. Carton carton
Printing standardization is simple to say, but it is not easy to do. It mainly includes the following three aspects of standardization. Carton carton
1 Standardization of printing environment: such as temperature and humidity control, standard light source. Combination printing
2 Standardization of printing materials: such as paper, ink, fountain solution, blanket, printing plate, etc. Printing and packaging city
3 standardization of printing status: such as density, dot gain, printing contrast, overprinting rate, gray balance, color gamut and other UV printing , these are the comprehensive reaction of equipment status, maintenance, data recording, raw and auxiliary materials, artificial experience. Agfa
Standardization is a systematic project that can be completed overnight, and requires the concerted efforts and cooperation of all departments to achieve. A G7 certification (GrayBalance gray balance color certification) can give the printing standardization a substantial connotation, which is also an opportunity for printing companies to start to transform into digital. Screen printing
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