HUDSON, N.H. and ROCHESTER, N.Y., March 11 -- Presstek, Inc., and Xerox Corporation today announced that Xerox will no longer sell the DocuColor 233 DI-4, DocuColor 400 DI-4 and DocuColor 400 DI-5 presses and related consumables, all of which had been sourced through Presstek. Order-taking for the products will end immediately. Xerox customers are being notified that Presstek will continue to provide consumables and make service available for the current installed base of Xerox DocuColor DI presses. Xerox said it is exiting the market for direct-imaging presses, which use traditional offset inks, to concentrate on its core business of dry-ink-based digital printing. Xerox will continue its strong focus on the graphic arts market with its line of DocuColor digital printers and presses, including the Xerox DocuColor iGen3 Digital Production Press.