I'm struggling with getting the 5370 to work with DTP. After trying a number of different approaches, the option that seems to want to work is creating a DTP Custom Paper Setting in the printer, loading the plate carrier (I'm using an 8.5" X 11" one to hold an exposure test plate) and then sending the exposure test file to the printer from Print Tool. This isn't perfect, particularly as far as what you can see in the way of Print Tool settings but it might be sending over a QTR Calibration file as requested.
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Unfortunately, every plate comes out with roller marks.
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The carrier is fed into the printer and then pushed back out to the front as ink is applied. There's very little support for the plate on the outbound trip.
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A revelation would be greatly appreciated.
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I adopted the Custom Paper Setting approach because the 5370 isn't provided with any poster board media files. Two Epson poster paper files are provided, both with photo paper as the media type. I looked online for Epson poster board media and or icc files - nothing from Epson.