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ayman
04-10-2012, 12:28 AM
hello,

i would like to know if Fiery can process PDF raster files to be printed on imagepress.
-if yes what is the best PDF raster settings to be generated from 3rd party prepress work flow in terms of DPI and LPI.
-any specific settings on fiery side
-is there any alternative to FJDF connection interms of hotfolders?

concern is to send ripped job to fiery to be printed on imagepress without any change to the file that may affect result

thank you

Mark_F
04-10-2012, 06:54 AM
Yes, JDF-enabled Fiery controllers support JDF job tickets that reference any content PDL file type the Fiery supports, including a raster in a PDF wrapper. Since objects no longer exist in a raster format, you obviously loose the use of much of the Fiery controller’s object-handling functionality, such as spot color, black, gray and font support.

The optimal raster settings would depend on what prepress system you are using, the resolution you are using on the Fiery controller and the engine you are using for output. Having the raster the same resolution as the final output generally provides the best results.

If you would like to color manage the rasters you are creating in a prepress system, rather than on the Fiery controller, you might want to configure the Fiery controller to just calibrate. Here are some guidelines for that:

Submit only CMYK data
Turn off print gray using black only (CMYK)
Set Black Text/Graphics to Normal (this disable's any special 100% black handling)
Disable spot color matching
Set the output profile to the most appropriate for the media you are using (it will be used for calibration and any toner reduction features)
Set CMYK Simulation profile to none (this disables color management, but applies calibration)

Submitting a JDF job ticket via JMF (JDF’s Job Messaging Format transport and messaging protocol) (http://jdf.fiery.com/?p=21) to get bi-directional integration, including real-time feedback. The latest EFI Hot Folders available for free download at http://w3.efi.com/cws5 has a JDF filter available for solutions that are not yet capable of JMF, but using that generally does not leverage the Fiery controller’s bi-directional JMF status functionality.

I wish you a profitable integration!

ayman
04-10-2012, 07:46 AM
hi Mark

thanks for your reply.

1- is it possible that i send raster PDF to fiery hotfolder instead of using FJDF connection?
2-is there any information about the problems or limitations of the FJDF connection especially when connected to agfa Apogee 7?
3- what type of connection do you advice?

thanks

Mark_F
04-10-2012, 10:09 PM
The same content file format support on a Fiery controller would be the same via JDF/JMF or Hot Folders or any other submission method.

Submitting via a Hot Folder would require using just one PDF per job. Submitting a multi-file run list of PDF's via JDF is supported, but the combined file size of all PDF's in the run list does can have some limitations depending on the model of your Fiery controller.

The Agfa Apogee team implemented one of the most elegant JDF/JMF integrations to Fiery controllers we have seen on the market. The integration teams at Agfa and EFI know each other well, so if you happen to try something creative that we did not think of testing and you find an issue, we can leverage our relationships to investigate.

What integrated workflow is best for you depends on many issues, including types of products, job ticketing (where & what), imposition, color management, media workflow, networking, data collection, device & job status display and so on. We find it usually takes about an hour and a half to discuss a customer's workflow needs and goals.

Besides being fully buzz-word compliant, bi-directional JDF/JMF integrated workflows offer many powerful features, but what is best for you would depend on your needs, jobs and environment.

It is a great conversation to have with your local contacts at solution providers you know and trust!

kvdpoel
04-12-2012, 03:47 PM
PDF Raster Compress format
At Agfa, we did a lot of testing of file size versus compression/decompression time and found that the PDF ZIP/Deflate compression is usually the best choice for lossless compression.

Resolution
as Mark explained, the resolution in the workflow should be set to one of the native resolutions of the engine/RIP to avoid extra conversions or artifacts. We usually recommend 600 dpi but enabling the "Smoothing" option available in Apogee 7.0 or newer. That will anti-alias the text and thin lines so that the look better. Note that using 1200 dpi will usually offer no visible benefits in raster.

Color correction
As Mark explained, it is important there is NO color correction applied in the RIP on the rasterdata. Since the RIP does not know the context (like text/lines/images) for rasterdata, a text that was 100% black will be converted to "Rich black" and CMY ink added. This makes the text/lines less sharp on print.
To avoid that, you need to setup the workflow NOT to embed an ICC Profile and use a Virtual Printer/Hot folder where the color correction is disabled in the Fiery.
The workflow must then use the proper engine profile to create the color managed raster data for the engine.

Koen Van de Poel
Agfa Digital Print / JDF Liaison officer

kvdpoel
04-12-2012, 03:51 PM
FJDF versus Hotfolder? (Question 1)
As Mark said, you can use the FJDF connection if you want to have full control and also status feedback between Apogee and Fiery RIP. A lot of testing was done for that between both companies.

For a quick, Fire and Forget solution (no feedback, no control), you can use the raster PDFs created by Apogee PDFProofer TP and send that to the proper Fiery hotfolder.
Note that PDFProofer might split the output into multiple PDFs to avoid hitting the file size limit of some RIPs.
The recommendations for compression, resolution and colormanaged remain the same as for FJDF.

Which is best (Question 3)
Color/Image quality is the same for both.
If you want the prepress operator (or automation) to have control, go for FJDF.

If the prepress workflow just has to deliver the PDFs and all job control is done by the Fiery/Press operator, then hotfolder is enough.
Note that this can introduce potential mismatches if the Fiery operator selects a different paper type than used in the workflow or if the finishing setup does not match with the Imposition in the workflow.

----
Koen Van de Poel
Agfa Digital Print/ JDF Liaison officer

ayman
04-12-2012, 10:31 PM
hi

Mark / Koen lots of thanks for your replies.

Is there any specific value for lpi when using the resolution of Raster pdf as 600dpi

thanks

kvdpoel
04-13-2012, 01:20 AM
LPI (lines per inch) is a term used for traditional screening where there are visible dots that grow in size. That was done because a conventional press has (had) issues with very small dots.
Digital Presses use a different screening approach, more like random (stochastic) dots so LPI does not apply. E.g. the Fiery could offer 3 different screening options but they do not contain LPI.
Since a raster file is not screened, only the resolution (DPI) is important to specify in a workflow.