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FLEXO Magazine : October 2011
SPOT-ON ACCURACY The good news for flexo profes- sionals today is that new leading- edge technology now makes it possible to get optimum density information for any spot color, right at your fingertips. A new software product called SpotOn! FlexoTM can use spectral data to provide optimal density infor- mation, allowing the operator to run a spot color to match a reference color. This software compares the spectral data of a color measured on a press pull (using a spectropho- tometer) to the spectral data of the reference color. A quick calculation gives the press operator the optimal density to obtain the closest (lowest Delta E, or dE) match to the refer- ence color. The SpotOn! Flexo software’s user interface uses a simple color-coded icon tool to indicate the density cor- rections. Green means the optimal density and color match to the reference color has been achieved. Yellow up or down arrows indicate the density correction needed to achieve the optimal color match. And a red circle indicates the color cannot be matched using the current ink mixture. The software also provides a trending chart of the density and the corresponding Delta E versus the reference color. Reference colors can be loaded into the software in one of three ways: • Ink formulations files such as MIF or CxF files can be uploaded • Colors can be measured into the software using a spectrophotometer • Colors can be input using CIELAB coordinates SpotOn! Flexo supports all of the popular Delta E equations: dE1976, dE1994, dE2000, dECMC. The software allows the user to set the dE tolerances for a specific job. The user sets both warning and fail toler- ances. For example, a customer may require all spot colors to be within a range 3 dE to be accepted, and will be considered failing at 5 dE. Electromagnetic spectrum charts ration output of recognizable household devices. 72 FLEXO octobEr 2011 www.flexography.org