Canon Oce Colr Wave 500 Operation Manual page 250

The original type
Original type
[Dark original]
[Folded lines/text]
[Blueprint]
250 Chapter 4 - Use the Printing System
Definition
Used especially for Diazo originals. Originals with a changing 'cloudy'
background.
Used for monochrome CAD drawings with folds. Lines and wrinkles are
suppressed. For folded color CAD drawings use [Colored original].
Used for classic blueprints, with white information on a blue back-
ground.