Is anyone using the WT7900 with the esko rip.?? If so how does the illustrator file set up in terms of printing the white.??
I am not certain that Adobe Illustrator set up - or how the PDF is set up - is much different for any of the RIPs, but I may be mistaken. I only have experience using our Compose Star Proof application to drive the Epson WT7900, and we are taking RIPed 1 bit TIFF files to send that to the WT7900.
in the case that you are sending a pdf to our workflow, we can of course print the spot white separately and set everything to overprint this...
YouTube - EPSON WT7900 Output
Below, I have shared a You Tube video that explains how we advise customers whom only have Adobe Illustrator, but this approach might not be required if you have an Esko RIP - here is the link;
YouTube - WhiteSpot_explain
This uses the 'set the white to overprint and put that spot white on top of the artwork' approach...
which means "In Acrobat, go to the Advanced Menu, select Print Production and cascade select Output Preview and be sure "Simulate Overprinting" is check ( on ) so the white overprints the rest of the art and you can see through it...
Also, I created a small PDF that explains how things need to be set up to print the Color-Logic.com "effect proof" with white ink on the Epson Metallic foil substrate on the WT7900 - i attached that pdf to this post (it is named ExplainVers_4.9b.pdf
hope this is helpful in some way...