Digital Printing Enfocus switch with HP Indigo
The app makes a progressive list of eight checks to decide EPM eligibility. 1)
2) 3)
Colour pages – if a job is one- color black, EPM is not a logical choice
Spot colours – this check looks for the presence of specific spot colour based a user defined list
Small black objects – thin one- colour black lines or small text is checked against a threshold
4) Mostly black content – checks for a percentage of one-color black pages and percentage of page area that is one-color black
5) 6) 7) E
nfocus has been in partnership with HP for some time. HP develops a set of configurators for Enfocus Switch.
They are plug-ins that allow Switch to communicate and send jobs using integrated HP technologies. The advantages of the partnership provide HP Indigo and Enfocus Switch customers with a solution that automates production from job order to output at press. Job receipt, preflight, processing and delivery to an Indigo are fully automated. There are currently several HP Indigo plug-ins, called configurators, that install with Enfocus Switch. These configurators provide functionality and communication that more closely integrate HP Indigo into an Enfocus Switch workflow. Each of these simplifies the integration of HP Indigo processes. For example, the DFE JDF Control configurator facilitates the use of job metadata variables to set Indigo job preferences on the press. •HP SmartStream Production Pro Print Server
•HP SmartStream Production Centre
•HP SmartStream Designer (Ganging, Imposition, VDP)
•HP Digital Front End JDF Control
•HP PageWide Web Press JDF Control
There is also an app available on the
Enfocus Appstore. Enfocus and HP collaboratively offer the Switch HP Indigo EPM Preflight Module. Anyone who has an HP Indigo press should know what EPM mode is all about. In short, it allows jobs to be run using cyan, magenta and yellow, saving clicks and speeding up run times. The black channel gets simulated using a
22 April 2020
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CMY mix. Determining which jobs can be run in EPM while retaining the same visual appearance as CMYK can amount to a lot of test runs on press. That is neither cost effective nor time considerate. There are some definable criteria, though. For instance, small black text will require some tight registration since it’s being converted from one black channel to three channels. Other decisions are more subjective. Is the original, expected colour acceptably reproducible using CMY as opposed to CMYK. Simply put, does the CMYK job look the same as the EPM job? The HP Indigo EPM Preflight Solution is an Enfocus Switch app that takes the guesswork out of the process.
8)
Rich black – compares content to a user defined range of CMY mix used to create rich black
Total ink – looks for specified square area amounts that exceed a total ink threshold
deltaE – checks pages using a device link profile for a maximum deltaE
deltaC – checks pages using a device link profile for a maximum deltaC
Keep in mind that the app makes these checks in this order and each check is pass or fail. So, if a job fails at spot colours, it will not get checked for total ink. It’s very important to know that each of these checks is customisable and thresholds can be set using variables. What that means is that it’s possible to check each job using different tolerances through the same Switch flow. Enfocus and HP are always improving their integration and working on new apps.
enfocus.com
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