Canon LBP7780CX User Manual page 288

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[Use Grayscale

[Use Pure Black

Overprinting]

[Use Composite

Overprinting]

[Brightness]

Specify the settings for [Print Settings] as the following, as needed.

within the machine's color gamut.

You can use this machine's grayscale profile to convert device-dependent grey data to CMYK

data. However, it may be reproduced using black (Bk) toner only, by using the [Output Profile]

or [Use Pure Black Text] settings.

You can print data for black colors created by applications using only 100% black toner. Since

monochrome (black) toner only is used for black text, there is never the problem of color toner

slurring around the edges of the characters.

If the check box for this option is selected, the printer prints black text over a color background.

If this option is used with [Use Pure Black Text], the printer prints all the background first, and

then prints the text over the color background using only the black (Bk) toner. This alleviates

the phenomenon in which the outlines of the printed black text are rimmed with white.

You can overprint device-dependent CMYK data as composite output. Since all the colors used

in the data are overprinted to a single palette, you can check the result without performing color

You can adjust the brightness of the whole image. You can use this item to set from 85%

to115% at intervals of 5%. The smaller the value the brighter it becomes. The larger the value

the darker it becomes.

Select the method for converting color print data to grayscale for printing.

This setting is for converting color data to B&W data.

The setting for this item becomes invalid for B&W data.

If [Color Mode] is set as [Auto (Color/Black and White)], the setting for this item becomes

It calculates the grayscale value using the sRGB standard color conversion

It calculates the grayscale value using the NTSC standard color conversion

It takes the average value of the Red, Green and Blue color values as the

grayscale value.

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