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