COLOR DIGITAL PRESSES--Decisions, Decisions . . .
Xerox's other digital press offerings include the DocuColor 2060, the DocuColor 2045, and the DocuColor 100 and 130, as well as the FutureColor.
The 74 Karat is a four-color, digitally integrated, waterless offset press that is the result of a partnership between Scitex and KBA. The press delivers print quality equal to any high-quality, four-color offset press, notes David Bartram, vice president of marketing for Karat Digital Press.
The 74 Karat can print up to 10,000 sph, in formats up to 201⁄2x29˝, on a wide range of papers. Bartram states that it takes six minutes to image a full set of 2,540 dpi Presstek plates.
It is the only press to offer the Gravuflow inking system, which is designed to minimize operator intervention and place the responsibility for color management with the prepress department. Sensors in the ink chamber detect ink consumption and initiate replenishment, when necessary. A precision-engraved roller sits under the ink chamber, right above the form. Doctor blades maintain a measured volume of ink in the engravings on the Gravuflow roller, so that a consistent amount is transferred to recharge the form roller.
The rubber blanket-coated form roller, which has a circumference equal to half the plate cylinder, meets the plate only when it carries a perfect layer of ink. The plates get an even supply of ink so that there is no mechanical ink ghosting, regardless of image or coverage during each revolution.
While the 74 Karat is configured for the short-run market, the manufacturer points out that it is versatile enough to compete in the medium-run market. "Our customers have found that the number of jobs per day they get off this machine is far superior to a conventional press operating in a conventional platemaking environment," says Bartram.
Xeikon North America
Xeikon offers a family of six digital color devices, ranging from its CSP 320 D sheetfed press to its DCP 320 D and DCP 500 web digital color presses. The CSP 320 D outputs 1,920 full-color pages per hour (pph). It also incorporates Xeikon's One Pass duplex electrophotographic technology, which prints both sides of the sheet simultaneously—reducing total run times, eliminating the reprocessing of substrates and ensuring front-to-back registration.