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FLEXO Magazine : October 2010
What is needed is a system that allows the brand owner to approve a color and then know that prepress vendors, ink suppliers and printers are all using the correct color infor- mation at all stages of the job workflow. The ultimate goal of centralized color servers is to provide the brand owners with piece of mind that the color information is being communi- cated correctly from design to finished product. AdvAntAges of Cloud Computing A centralized color database facilitates accurate color communication throughout the supply chain. The utilization of Internet technology allows all supply chain members, from brand owners and prepress vendors to printers and ink sup- pliers, to access the exact same color information. A uniform applications programming interface (API) fur- ther insures that all supply chain members have equal and simultaneous access to the color information, regardless of the client software applications they choose to utilize, as long as those applications support the database API. Gone are the days of emailing color standards, or worse yet, sending physi- cal swatches via overnight delivery. The correct color information is accessible anywhere in the world anytime with an API accessible centralized color server. The concern that swatches won’t arrive at the manufactur- ing facility in time is no longer an issue. The cost to overnight swatches and incur press downtime charges while waiting become a problem of the past. With all color information residing on a single, central- ized color server, duplicate colors can be consolidated with advanced search technologies. Fewer colors for the supply chain to manage results in savings of many kinds—for ex- ample, a reduction in errors with fewer similar colors to select from, or less ink inventory to manage for the printing facility. speCtrAl refleCtAnCe dAtA Spectral reflectance curves are the lowest common de- nominator of color information. With a spectral reflectance curve, all other colormetric and densitometric values can be calculated. This is a bit of an over simplification, as entire international standards have been written on the subject. Suffice it say that values like L*a*b*, L*C*H*, XYZ, den- sity, dot area, tone value increase and just about any other measure of color or print quality you are familiar with can be derived from a spectral reflectance curve. Of even greater importance, however, is the ability to derive the aforementioned values based upon any illuminant and observer pair. These are denoted as D50/2 degree or per- haps D65/10 degree. Again, suffice it to say that when color standards are provided in, say L*a*b* D50/2 degree, they can not be converted to D65/10 degree. Different illuminant and observer pairs will result in different values. Working with a spectral reflectance curve standard, either can be quickly and easily delivered. Additionally, availability of spectral reflectance curves provides the ability to compare curves for metemeric match issues. While there are mathematical equations to calculate the likelihood of a metemeric pair, it is often just as quick to visually assess the fit of two spectral curves to each other. In fact, you could compare the spectral response of dif- ferent instrument models across the entire visual spectrum. With this information, you would be able to assess the ability to use different models of instruments across your system for color verification and process control. Using instruments SeSSion TopicS: • FREE Pre-conference: Color Success Before Getting to Press • The Great Flexo Digital Plate Debate • Sustainability from the Printer’s Perspective • Impacting an Industry – The Flexo Quality Consortium • The Voice of the Industry: Best of FLEXO Magazine • Process Improvement – Best Practices FIRST • Color Consistency for Packaging – FIRST and Worldwide Standards RaTeS: Consumer Product Company FTA Member: $95 | Non-member: $190 Printer/Converter & Design Firm FTA Member: $295 | Non-member: $590 General Attendee (non-exhibiting company) FTA Member: $595 | Non-member: $1,190 General Attendee (exhibiting company) FTA Member: $395 | Non-member: $790 www.flexography.org | www.ftastore.com November 8-10 | Hyatt Regency | Louisville, Kentucky chaiR: CAyleigh NiChols, PrAirie sTATe grouP | co-chaiR: riChArd BlACk, All PriNTiNg resourCes, iNC. FFTA’s 2010 FAll ConFerenCe & TAbleTop exhibiTion A rate idea: The future of flexo & process improvement FallCon2010_OctFLX_mech.indd 1 9/27/10 10:02 AM FLX_Oct10_mech.indd 28 10/15/10 12:31 AM
Sustainable Fall 2010