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FLEXO Magazine : November 2013
ink film thickness, which the press inking system will lay down, govern this step. Any changes to the ink system or the press components must be conveyed to the color matcher—an obvious statement, but one that frequently is ignored • Proof: A drawdown is made using a method that matches the coating weight and appearance of the actual press. The substrate used for proofing should be the one that will be used in production. If the ink is to be reverse-print- ed on film and backed with white ink or printed on coated board and UV-lacquered, it should be proofed this way • Inspection: This is where the skills and experience of the color matcher are demonstrated. The proof sample is compared to the color standard approved by the end user. While the final decision is made using a visual comparison, spectrophotometric measurements are a useful tool to aid the color matcher. The most difficult task is to match a color standard previously printed by a process other than flexography and/or on a different substrate. A typical scenario is where ink for printing on film is being matched to a spot color, which is printed on offset-lithographic paper. When the ink technician is satisfied with the match, it can be measured and stored in the color computer • Approval Process: Color match proofs are sent to the customer for approval and copies are retained in the ink- room. Signed, approved proofs from the customer then serve as the color target for making ink for the qualify- ing pressrun Editor’s Note: Flexography: Principles & Practices 6.0 (FP&P) features more than 600 pages, 29 chapters, hundreds of illustrations, a detailed glossary and extensive troubleshooting guide. For more information on purchasing a copy of FP&P, visit www.flexography.org/fpp. 48 FLeXO NOVEMbEr 2013 www.flexography.org WORKFLOW / PROOFING / SECURITY SOLUTIONS / PLATES & CTP SYSTEMS ©Kodak,2013.Kodak,FlexcelandPrinergyPowerpackaretrademarks. With a pair of award-winning flexographic solutions in our portfolio we are confident we can exceed your expectations. The Kodak Flexcel NX System and recently launched Kodak Flexcel Direct System represent the leading edge of innovation, driving outstanding efficiency and quality benefits in flexo printing. Complemented by our bulletproof Kodak Prinergy Powerpack Workflow they position your business to ‘Do More With Less’. Make a change for the better. Learn about Kodak’s Award Winning Flexographic Packaging Solutions at kodak.com/go/flexcelnx Black White Green Purple Blue Rhodamine BS Red YS Red Orange GS Yellow Extender Weigh up 100 grams Adjust viscosity & strength Proof Visual & spectral measurement Color OK? Adjust formula Approval process NO YES image 4: basic Color Formulation Flowchart You have to Understand it. Order your copy today. Fta Members: $130 | List: $260 Kindle: $99 Understand .. . the fundamentals of the flexographic workflow Understand .. .the core components, concepts and applications Understand . .. what drives superior print quality before You can control it using www.flexography.org/fpp ... abookshe lf essent i a l f orevery fl exographer :