I prefer to work with the web, so it's been forever since I've worked with a printer. Just received this message back regarding a doc utilizing white ink. How can I accomplish this in Adobe Illustrator? (The doc is already assigned CMYK.)
What we need are print ready PDFs with the white ink designated as a Spot Color titled "White."
Double-click the "White" swatch in the Swatches Panel inside Illustrator.
Change the top dropdown menu to Spot Color:
Now select all the white elements in your piece and ensure they are using that swatch for the stroke/fill color.
Note, simply adjusting the Swatch options isn't enough. You'll have to manually reset all the objects using White to this swatch.