As always many thanks for all your help and expertise.
Just to be clear once I have the EMX or EMY installed on both the computer and the printer, then in the Lightroom Print Module I assume I choose "Managed by Printer", choose the actual name of the media from the Media Type dialog in the print driver and manually choose the same paper on the printer's lcd panel. Is that right?
Hi,
If you work with a colour managed workflow, keep using the .icc profile associated with the paper. When you install the EMX file, the specific paper will appear in the Media type in the printer dialogue. Lightroom does not read the EMX file, so it does not have a reference of what icc profile to use. The same if you print directly from Photoshop.
Now, if you use instead the Epson Print Layout software (either from LR or PS), then it can select the associated .icc profile when you chose the paper in the Media Type dialogue inside Epson Print Layout.
In regards to the Canson papers, specifically the Baryta Prestige II, the downloaded zip file should contain the files "cifa_p5300_prestige2_340_p_bk.icc" and ""EPSON SC-P5300 Canson Infinity Baryta Prestige II.emy2", so the same workflow applies.
Usually the EMX file includes parameters for platen gap, paper thickness, drying time per pass, and for a printer such as the P5300 it may include roll tension and paper suction. The EMX / EMY files provided by the paper vendors are not editable, but you can create a copy in Epson Media Installer and you can edit this copied file to adjust any parameter.