Matthews Packaging Graphics & Design (Pittsburgh) and Heidelberg (Kennesaw, GA) speak the same language—the language of color—thanks to Matthews PG&D抯 multiple installations of Heidelberg抯 PrintOpen color profiling software. According to operations manager Kevin Chop, Matthews PG&D抯 Pittsburgh facility has been working with PrintOpen for the past three years, as have company facilities located in Alameda, CA, and St. Louis. The company currently is working to bring its Atlanta, Dallas and Kansas City, MO, facilities online with PrintOpen. The parent company, Matthews Intl., is a leading provider of prepress and imaging systems used by corrugated and flexible packaging manufacturers to reproduce text, graphics, logos, bar codes and other images and tooling on packaging materials. Chop says, 揂s a result of acquisition and diversification, Matthews has developed the capability to work with brand owners at different levels.?

  Matthews PG&D provides creative design, prepress, digital asset management, 3-D renderings, digital photography and Web site development to the packaging industry and its end-users, primarily consumer product companies, converters and ad agency customers. The company provides early support and expertise in planning, developing and integrating media programs of all types.

  A common thread

  International Color Consortium (ICC) profiles provide the basis for what has become a standardized communication tool-a language of color. The importance of color profiling is based on the fact that process control and quality assurance are integral to the efficiency of the distributed production process that involves the calibration of individual devices and the definition and monitoring of all press parameters, such as paper and ink density. Once the properties of the various input and output processes have been defined, color management should be able to ensure communication among the various processes. With Heidelberg抯 PrintOpen, says Chop, it can.

  Matthews?prepress specialties include color management (ICC profiling); development of brand owners?color standards; digital workflows; digital photography; auto- and interactive trapping; digital proofing; calibrated film output; flexographic digital plates; high-resolution color scanning; and conventional, stochastic and hybrid screening. With PrintOpen, Chop says, 揥e can take color profiling way upstream to the planning and design stage in an effort to scrub time, labor and the potential for error from the project cycle.?

  Matchmaker, matchmaker?

  With 11 North American and eight European locations, Matthews Intl. has a global network of contacts that enables it to meet the needs of its brand-owner customers. Chop explains that Matthews PG&D occasionally provides 搈ock-ups color-managed to a particular print discipline or print environment,?as well as some design work. As a prepress and brand ownership manager, however, Matthews?primary business is controlling the brand assets. The company works with ad agencies, manufacturers, printers and publishers to match the brand owner抯 requirements the appropriate output discipline, from flexography to offset and screen-printing to gravure, based on the requirements of the brand owner, the value of packaging assets, and the technical requirements of the project at hand.

  A typical example involves ensuring a pressure-sensitive label for a soft-drink bottle and its folding carton carrier are color-coordinated, regardless of the printing technology. In this instance, flexography is used for the pressure-sensitive label; gravure for the carrier. Matthews?expertise with color management secures its niche.

  Welcome to my space

  The color spaces of printing presses can differ for many reasons, including different inks, paper grades or inking sequences. To ensure reliable color reproduction, all input units involved in the process must communicate in the correct colors with all output devices.

  Color profiling ensures the accuracy of critical data needed for consistent and repeatable reproduction. 揚rintOpen is extremely versatile,?Chop says. 揥e use it for flexo, offset, screen, gravure and all the sub-disciplines within each category.?PrintOpen is one of two components in Heidelberg抯 Prinect Profile Toolbox. The other, Quality Monitor, fulfills process monitoring tasks and checks the color quality of proofs and prints. Matthews PG&D uses both components.

  Brand owners perceive the value of Matthews?involvement in terms of consistency, control and Matthews?ability to keep tabs on its all-important brand assets. However, Chop says Matthews also recognizes that 搈ost people in procurement want the proof, not the color details, even though they are important.?He adds, 揥e can educate everyone involved that device- and process-independent CIELab (color space) values can be achieved and applied.?

  Chop explains that Matthews PG&D does not get involved in setting up a relationship between the brand owner and print provider, and makes no recommendations unless asked. Typically, says Chop, the brand owner/customer already will have chosen a print provider. 揙nce asked, however, Matthews gets the ball rolling by notifying the printer that it has a project coming in,?he says.

  According to Chop, PrintOpen first generates a 損rint form?(fingerprint, characterization or test pattern), which is output via the selected flexographic, offset or gravure device. 揃y running a form on press, you抮e taking a snapshot of the specific press environment, including the actual inks that will be used once the job is on press,?Chop says. 揧ou then feed the printed result into PrintOpen, measure it spectrophotometrically, and use the result to calculate the ICC profiles for a selected press, based on the specific image content of a project.?

  Matthews calibrates the presses and deploys a project-based team to oversee the customer抯 job as it nears press time. 揥e抳e grown up from offering primarily prepress services,?Chop explains. 揅onsequently, we also look at the printer as our customer, and we can show the benefit of our involvement in accurate color management and enhanced proofing. We make the printer look good to the brand owner.?

  What the eye can抰 see

  揕ike beauty, color may exist in the eye of the beholder,?says Raymond Cassino, Heidelberg USA抯 director of product management, Prepress. He explains that in a fiercely competitive market, a provider抯 ability to win and retain customers often depends on having a reliable method for reproducing color.

  The key is to look beyond the visual perception of individuals involved in the proofing process. Cassino explains, 揅olors we see on a computer monitor are not an accurate representation of what will appear on paper. Monitor calibration (or lack of calibration) and ambient conditions (lighting, temperature) can significantly affect how color is perceived onscreen during the design and prepress stages. Further downstream, the color spaces of printing presses can vary according to type of ink, inking sequences and paper grade.?

  Cassino advocates achieving reliable color reproduction by ensuring all input units can communicate the correct colors to all output devices. How? With a standardized, open, vendor-neutral color management system. 揟he need for [this] became clear when the growing popularity of desktop graphic programs took control of the image away from the printer or prepress house and made it available to everyone,?he says. 揢nfortunately, these desktop tools could not guarantee the quality of file reproductions when it came to printing.?

  In 1993, the Intl. Color Consortium (ICC) developed a set of image source standards designed to remove as much subjectivity as possible to help ensure predictable, repeatable color reproduction.

  One focus of these standards is color profiling, which, as Cassino notes, is an important factor in process control, quality assurance and production efficiency. 揑CC-based color management uses 憄rofiles?to tag images,?he explains. 揊rom input to output, the process involves calibration of individual devices (proofing systems) and the definition and monitoring of all press parameters such as paper, ink, print density, etc. Once properties of the input and output processes have been defined, color management ensures communication among them.?

  Increasing color consistency from print run to print run and process to process, as well as from one media type to the next, enables printers to preserve the integrity of their clients?brands. 揅olor management affects the entire printing process—from label to folding carton carrier to POP displays-regardless of the print discipline involved (flexo, gravure, offset, etc.),?says Cassino.

  Eliminating the guesswork

  Cassino is quick to acknowledge the trickier aspects of color management, citing a number of problems including the use of uncalibrated input and output devices, and the process of converting images created in RGB or CIELab to CMYK for print applications. 揟hese problems stem from a common source,?he says. 揇esigners, photographers, ad agencies and other file originators frequently create images that are incompatible with real-life press environments.?

  Just as a user cannot judge color accurately on an uncalibrated monitor, Cassino explains, color cannot be reproduced accurately on an uncalibrated proofer or press. Instead, professional color management relies on the numeric values representing every pixel of an image. 揟his is the essence of color management and the value of color profiling,?he says. 揑f this offends some artistic sensibilities, it is a necessary precaution to take if the goal is to build a file that can be reproduced accurately on press.?

  Dueling workflows

  Understanding color management enables a person to choose the appropriate printing process (offset, flexo, gravure or screen) for a job. 揃y the same token,?Cassino says, 損ractical knowledge of printing processes—including the behavior of inks, coatings and substrates-is essential to effective color management.?High-end sheetfed offset production of color-critical materials-such as advertising for automobiles, cosmetics, textiles, or liquid or metal items-carries different requirements than ads for less brand-sensitive items. Says Cassino, 揃rand sensitivity determines what the level of production and scrutiny is likely to be, and it will have a direct bearing on the economics involved.?

  Today it is possible to print on virtually anything from plastics to corrugated cardboard. However, 揂 considerable level of technical sophistication is needed to produce saleable results from press to press and process to process,?Cassino cautions. 揟o avoid finger-pointing and temper tantrums, a printer can offer a high level of expertise in color management, and a color management expert can understand the possibilities inherent in choice of process.?

  It helps to have the right tools. A number of user-friendly plug-ins are available to help reconcile prepress and print production workflows for maximum consistency. 揂s we have seen, however, an approach that combines a thorough knowledge of color and process will inform any fully integrated approach to workflow management,?says Cassino. 揑t is here, in the no man抯 land between prepress and press, that proven, real-world experience can pay for itself.

  Goodbye, trial-and-error

  Chop is a former scanner operator who appreciates PrintOpen抯 ability to match disparate color spaces at every stage of the project cycle. PrintOpen抯 automatically generated monitor image, which reproduces the color impression of the image that will be seen in print, represents a tremendous time and labor savings vs. attempting to achieve the same result manually.

 

  Goodbye, trial-and-error

  Chop is a former scanner operator who appreciates PrintOpen抯 ability to match disparate color spaces at every stage of the project cycle. PrintOpen抯 automatically generated monitor image, which reproduces the color impression of the image that will be seen in print, represents a tremendous time and labor savings vs. attempting to achieve the same result manually.

  Color profiling yields color fidelity, fewer misprints, greater efficiency, waste reduction and lower costs over the long term. 揑f you are used to dealing with conventional separations, PrintOpen is a godsend,?Chop says. 揙ther tools are able to evaluate and edit color profiles, but PrintOpen is miles and miles ahead. It抯 a thoroughly professional tool. It speaks the language of color separation.?

 

[时间：2005-09-09  作者：AP staff  来源：bisenet]