Correcting Uneven Density

69L8-0R7
If the density is uneven when printing, perform <Correct Shading>. There are various methods for correcting the density: Correction with a Densitometer using a commercial measuring instrument, Visual Correction, and Scanner Correction.
Adjustments may not be performed effectively if there is not sufficient toner.
Checking the Remaining Toner Level

Correction with a Densitometer

Measure a test page you have output with a commercial densitometer and enter the measured density values to correct the density of halftone areas.
1
Press  (Settings/Registration)  <Adjustment/Maintenance> <Adjust Image Quality> <Correct Shading> <Densitometer Correction>.
2
Press <Start Printing>.
A test page is printed.
3
Measure the test page with a densitometer.
Measure marks 1 to 7 printed on the test page, and make a note of the density values that are detected.
4
Press <Fine Adjust> for each color.
5
Enter the density values.
Enter the density values you measured and made a note of in step 3 in 1 to 7 for each color.
6
Press <OK>.
7
Press <Output Test Page> <Start Printing>.
A test page after correction is output.
8
If there is no problem with the test page, press <Store and Finish>.
If the density of the test page after correction is uneven, perform the procedure indicated in Visual Correction.

Visual Correction

Visually measure a test page you have output to perform correction using the density adjustment values you determine. Use this procedure when you do not have a densitometer or when correction is not effective.
1
Press  (Settings/Registration)  <Adjustment/Maintenance> <Adjust Image Quality> <Correct Shading> <Visual Correction>.
2
Press <Output Test Page> <Start Printing>.
A test page is printed.
3
Visually check the test page to determine the density adjustment values.
The range of marks printed for each color may be -6 to +6 or -5 to +5, depending on the paper size used for the test page.
4
Press <Fine Adjust> for each color.
5
Enter the density values.
Enter the density values according to the results that you visually checked in step 3 from -6 to +6 (or -5 to +5) for each color.
Enter a plus value to increase the density, or a minus value to decrease the density.
6
Press <OK>.
7
Press <Output Test Page> <Start Printing>.
A test page after correction is output.
8
If there is no problem with the test page, press <Store and Finish>.

Scanner Correction

You can perform density correction by scanning a test page that you have output. The machine automatically determines density correction values and corrects irregularities.
1
Press  (Settings/Registration)  <Adjustment/Maintenance>  <Adjust Image Quality>  <Correct Shading>  <Scanner Correction>.
2
Select the paper to use and press <OK>.
3
Press <Start Printing>.
A test page is printed.
4
Place the test page on the platen glass.
Place the test page face down on the platen glass. Make sure the cyan bar is at the top edge of the glass.
5
Close the feeder and press <Start Scanning>.
The test page is scanned.
6
Open the feeder and remove the test page.

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User's Guide (Product Manual)
USRMA-3777-042019-12Copyright CANON INC. 2019