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FLEXO Magazine : March 2010
and FIRST says, The purpose of proofing an ink is to generate accurate and repeatable color matches, which minimize or eliminate downtime on press. The ink should be proofed on the same substrate as the print job and compared to the customer-approved standard using a spectrophotometer. Current proofing methods can be divided into three general categories: hand proofers, mechanical bar proofers, and laboratory-scaled flexographic proofing machines. TEST says, This practice is essential! You cannot rely on the formula alone to assure color accuracy on press. The proofing method described above is a perfect method for a newly approved job. But what about when you are in the middle of a run and you get low? It is highly recommended that you take a wet sample of the ink that is currently on press and create a proof of it to use as your mixing standard. Again, use the same substrate as on press and accurately measure it with a spectrophotometer. Now formulate your new ink batch and compare against your mixing standard. For more information, see Section 24.2 (page 264) of FIRST 4.0. The Keys to Flexographic Excellence What is FIRST The intention of FIRST is to provide all participants in the flexographic reproduction process with a common set of guidelines, tutorials and data that can be used as communication and production tools. The aim of FIRST is to create a common set of specifications and commu- nication protocols for the industry. This platform should establish common communication and identify the responsibility of the provider(s). To order FIRST, call 631-737-6020 or visit www.ftastore.com. What is TEST TEST is the educational arm of the Flexographic Technical Association. The aim of TEST is to align all of the training materials available through the FTA with the guidelines, tutorials and data identified in FIRST. TEST is focused on implementing new learning methodologies to reach out to a larger portion of the FTA membership. For more information on TEST, visit www.flexography.org.
Sustainable Winter 2010