Oce Arizona 400 Series GT User Manual page 171

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[116] Color Swatch
Use the new swatch for any objects or fills which need to be printed with white ink.
6.
Clicking on new spot color swatch will make this the default fill color for this document.
Select element you would like to be treated with Spot information and choose the fill
swatch. See the example below.
[118] Select Spot Fill
Once you've configured your source image with white ink as your new spot color, save
7.
your work.
How to Overprint Spot Data in Illustrator
By default, when you print opaque, overlapping colors, the top color knocks out (cuts a
hole) in the area of colored image underneath. Overprinting prevents knockout and allows
the colored image data to print over top of the other color being used, which in this case
is white. You will want to overprint when the artwork needs to be printed over top of
white, usually if the substrate material is non-white and therefore white is required to
accurately render image data.
How to Create White Spot Data in Illustrator
[117] Spot Swatch
Chapter 9 - How to Work With White Ink and Varnish 171