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FLEXO Magazine : November 2009
www.flexography.org NOVEMBER 2009 FLEXO 11 Being an independent ink manufacturer gives us the freedom to respond to your needs more quickly and with greater flexibility. It also makes our personal commitment to product excellence and exceptional service more binding. We call that our "Signature Service" and we take pride in helping printers achieve the best printing results possible. If you're not receiving our Signature Service now, perhaps it's time you experienced an independence day and talk with an Alden & Ott specialist. For over 50 years, the quality and service goes in before our name goes on--- Alden & Ott Printing Inks. • Offset Printing Inks • Flexographic Printing Inks Alden & Ott Printing Inks Company Arlington Heights, IL tel: 847.364.6817 1.800.552.INKS aldenottink.com We’ve always believed in independence. stressed that most RIPS have an ap- plication to navigate through it: 1. Determine dot gain on press (TVI). 2. ID required dot gain. 3. Calculate compensation curves (DGC). 4. Enter DGC into the RIP. With that, both warnings and obser- vations were voiced. "If a digital proof is compensated to the dot gain-compen- sated press, then it will match extremely well," Mazur said. "But, if you use dot gain compensation to match a standard proofing system---for example, GRA- COL---it will match very poorly." Explaining why, Mazur indicated that dot gain is far from the only issue. Ink hues, ink trapping, ink transparency and paper color all exert an impact. "Dot gain compensation is the most widely used technology, but there is a better solution," he opined. Haynes seized upon that remark and stated, "Near-neutral gray balance is a simple extension of the TVI curve." She immediately cautioned, "G7 is not color management; nor is it a replacement for fingerprinting or characterization. It's a specification devised for specific goals, namely matching: proof to press, press to press, one process to another and different consumables to each other--- e.g. ink and substrate." Explaining things further, Haynes said, "G7 defines a target for all to run to." Advantages associated with it include the establishment and main- tenance of neutral grays that help match other CMYK process colors and improve ICC profiles. "G7 is simply another weapon in the arsenal used to control the press." The same could be said for Russell's topic---ICC profile-to-profile conver- sions. "Curves mimic press conditions so profiles don't have to work so hard," he began. "A color profile is multi- dimensional. It increases the number of critical points and allows you to adjust different parts of the gamut." They are also useful in identifying trends over time and require less pauses to mea- sure press results on subsequent runs. Profiles are commonly needed when overprints differ from normal, ink hues are different than normal, a permanent change in ink sequence has occurred, and different methods of curved base corrections---say DGC or G7---produce different results. TECHNICAL INNOVATIONS Rapid-fire release of new product introductions and line enhancements is continuing at breakneck speed, according to Lon Robinson of Tension Envelope. He briefed listeners on the activities of just the past few months, focusing on both press and prepress, and touched on everything from heavy machinery to anilox rolls, plates, inking systems and competitive processes. Speed and functionality were cited as attributes of Fischer & Krecke's (Bobst Group's) graphic positioning system, which incorporates radio frequency identification (RFID) in sleeves and stores information to promote quick changeover. On the anilox front, Rob- inson pointed to Praxair's open cell technology and Apex's genetic transfer roll as tools that eliminate traditional cell patterns and just may promote bet- ter ink transfer and solid coverage, as well as clean up far more easily. In the FTA TODAY
Sustainable Fall 2009