Before using VJ-1324 OPERATION MANUAL
72 3.5 Test print
3.5.5 Color Verify
The color to be printed by printer varies depending on the aging variation of printer and ink, and the lot
difference between media, even under the same printing condition. This "Color Verify" is a function to
check the difference between the colors printed before and now.
In this function, 14 color patches are printed, and the colors are measure by the optional
spectrophotometer (SPECTROVUE VM-10). If the Color Verify was performed before and the
measured value was saved as the baseline, the color difference from the baseline will be printed as a
result.
Follow the 2 steps below to check the color reproducibility using the Color Verify.
1. Save the baseline
Perform the Color Verify under the condition* of comparison criterion, and save the measured value
(only one baseline can be saved).
* e.g.: To use a new media, after an initial ink charge, before starting the continuous print job, etc.
2. Check the current color reproducibility (Comparison with the baseline)
When a media or ink is replaced, or when the job that has been printed in the past, is printed again,
compare the color with the baseline to check if there is no significant change in the color reproducibility.
When the Color Verify is executed, the color difference (dE) is printed on the top of each color patch. If
the color difference (dE) is quite large, it means that the color reproducibility has varied from when the
baseline was saved. In general, if the dE is more than 3.2, the color difference in the print result will be
visible.
TIP
In this function, the color difference (dE) is calculated based on CIE 94*.
* CIE94 is proposed by CIE (International Commission of Illumination) in 1994.
NOTE
• The optional SPECTROVUE VM-10 is required to perform this function.
For more information, contact your local MUTOH dealer.
• Before performing this function, make sure to print the nozzle check pattern to check if there is no
missing nozzle.
• In order to perform the Color Verify correctly, make sure to specify the following settings same as
the setting when the baseline was saved. If these settings are different, the color difference may
become large.
• Each Heater Temperature Setting, Effect Setting, CR Print Width Setting, Overwrite Setting
• Use this function with the head height adjustment lever is in the "Low" position.
• Since the room environment (temperature, humidity) may affect the print color, create the
environment in accordance with the environment condition described in this manual "
8.1.1 Printer
specifications
" "Environment Condition". In addition, make sure to place the media and ink in the
printing environment for 2 hours before use.
• In this function, the baseline cannot be saved for each media. To perform the Color Verify with a
different media, the new baseline should be saved. (If the media is replace to the one previously
used, the baseline should be saved again.)
• "Color Verify" is a function to check the color variation in print color caused by various causes.
This function is not to guarantee the color reproducibility of the printer.