I am preparing artwork to be sent to a printer for the production of custom umbrellas. We want to print a logo on black fabric with 2-inks: white-spot and orange-spot (PMS 021) colours. The path in the picture is the stroke for the type. That's the one I want to be black, the fabric. Shown below is only one character coloured in orange.

current artwork

How do I get a stroke on an object to knockout underlying white ink and to not print on the stroke at all so that it ends up looking like the second image below? With 0% C 0% M 0% Y 0% K process swatch?

desired result

And how can I preview it? We don't have black paper nor white ink.


2 Answers 2


No, you simply use black (just like you are doing for the background) for the stroke on the text.

To make it easy, make your black a CMYK black, instead of a spot – then you can advise the printer to simply ignore all CMYK and print the spot plates only.

To visualise as you're working, bring up the "Separations Preview" (Window menu) to see a list of inks: it should show CMYK plus your two spot colours. Making sure Overprint Preview is turned on, you then turn off CMYK plates to see your white and orange plates in isolation. Only catch is you won't see white ink against the white artboard so temporarily colour your white ink with a bit of magenta or whatever.

  • I think that is an excellent answer. I would add the traditional colouring for a knockout line is cyan when using spot colours. Your personal printer will (most likely) translate your spot colours into CMYK so print away, it should be fine (following the above advice). You will use a lot of black ink by the look of it, so you might want to figure out how to limit that. Jul 29, 2014 at 18:47
  • @Ward huh? If your printer is converting Pantone spot colors into CMYK, get a new printer...
    – JohnB
    Jul 30, 2014 at 13:58

Select the path and that white burst.... choose Object > Compound Path > Make from the menu.

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