Canon imagePROGRAF TA-20 MFP 24" Large Format Printer with L24ei Scanner and Stand Kit - Manual (Page 723)

Colors in printed images are uneven
Check 1 Does this paper curl easily?
Colors in printed images may be uneven at the leading edge of paper that curls easily. Change the Transport
unit vacuum strength in the touch screen to increase the grip on the paper, or set a margin of at least 0.8
inches (20 mm) at the front edge of the paper.
Adjusting Vacuum Strength
Check 2 Make sure you are not printing with AirPrint. (macOS)
Select a printer to use on Printers & Scanners under System Preferences .
If "...AirPrint" is included in the printer name shown on Kind , you are using the printer with AirPrint. In this case,
install the CUPS driver and perform printing using the CUPS driver.
Check 3 Colors in printed images may be uneven if the Print Quality setting is too low
If using Windows, select Advanced Settings from the Main tab of the printer driver, and then select a higher
Print Quality setting.
If using macOS, select Quality & Media in the printer driver, and then select a higher Print Quality setting.
When Fast or Standard is selected, the printing time is shorter and less ink is used than with High , but the print
quality is reduced.
Changing the Print Quality and Correcting Image Data (Windows)
Changing the Print Quality and Correcting Image Data (macOS)
Check 4 Colors in printed images may be uneven on the boundary between shades if
there are dark and light areas in an image
Using the unidirectional printing function may reduce color unevenness in this situation.
Follow the steps below for unidirectional printing.
• Windows
Open Paper Detailed Settings from the Main tab of the printer driver, and then select Unidirectional
Printing .
• macOS
Open Paper Detailed Settings in the printer driver, and then select Unidirectional Printing .
Check 5 If printing borderless, colors in printed images may be a little uneven at the
leading edge of the paper because printing is interrupted to cut the paper
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