Preserving DeviceGray

This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.

It is sometimes desirable to avoid the color management of /DeviceGray through the /DeviceCMYK intercept as described in DeviceGray interception. It is achieved with this fragment:

<< /DeviceGray /DeviceGray >> setinterceptcolorspace

which explicitly preserves /DeviceGray as itself.

The same technique is not necessary for /DeviceRGB or /DeviceCMYK. It is only required for /DeviceGray because the default value of null means color managing via the /DeviceCMYK intercept profile.

Similarly, if /BlendCMYK and/or /SourceCMYK are set, the corresponding gray intercepts can be disabled with these fragments:

<< /BlendGray /DeviceGray >> setinterceptcolorspace

<< /SourceGray /DeviceGray >> setinterceptcolorspace