Canon i-SENSYS MF729Cx Important Safety Instructions And Installation Manual page 570

<Menu> <Printer Settings>
<Off>
Black and gray data with the equivalent ratio of R to G to B is printed using CMYK toners based on the selected
<Output Profile> setting.
<On>
Black and gray data with the equivalent ratio of R to G to B is printed using the black (K) toner only, regardless of the
selected <Output Profile> setting.
CMYK Pure Black Process
This setting enables you to specify how monochrome data (C=M=Y=0) should be printed when the device dependent CMYK data is
processed using the <CMYK Simulation Profile> of the machine.
Off
On
In combination with certain settings, monochrome data (C=M=Y=0) may be printed using the black (K) toner only, even if
<Off> is selected. The following are examples:
When <On> is selected for <Pure Black Text>
When <None> is selected for <CMYK Simulation Profile>
When <TR Normal> or <TR Photo> is selected for <Output Profile>
When [Use 100% GCR Profile] in the printer driver is selected
If <None> is selected for <CMYK Simulation Profile>, the CMYK Pure Black Process setting is not applied.
<Menu> <Printer Settings>
<Off>
Monochrome data (C=M=Y=0) is printed using CMYK toners based on the selected <Output Profile> setting.
<On>
Monochrome data (C=M=Y=0) is printed using the black (K) toner only, regardless of the selected <Output Profile>
setting.
Halftones
Specify the data processing method to reproduce halftones. You can select whether to use <Error Diffusion>, and you can also select
<Resolution> or <Gradation> separately for text, graphics, and images.
Error Diffusion
Off
<PS> <RGB Pure Black Process>
<PS> <CMYK Pure Black Process>
Select <Off> or <On>
Select <Off> or <On>