Oce Arizona 550 GT User Manual page 145

How to Configure ProductionHouse for White Ink
In your Quick Set, or in Preflight/Job Properties/Postscript turn off two-stage processing
3.
(make sure the box is not checked).
[94] Turn off Two Stage Processing
Result
ProductionHouse is now prepared to accept print jobs with white ink data.
Chapter 8 - How to Work With White Ink 145