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X-Rite ITX Color bar trouble shooting
Device Color bar requirements according to the manufacturer
At least 1 mm of paper should surround the Color bar
The image should not extend beyond the Color bar
Patch width and height should be set correctly and precisely, 0.1 mm deviation is already enough to shift patches along the bar
Color bars should have a solid patch for each ink for each ink zone
Color bars should have at least one substrate/paperwhite patch
The Colorbar should be imaged to align with the centre of the press sheet so the same number of patches will be falling off to the left and the right if a smaller sheet than the maximum press sheet size is printed.
MeasureColor ITX tips and tricks
For sake of correct recognition, reverse the patch sequence of one ink zone somewhere close to the centre of the bar. If a Color bar contains equal repeats only, the recognition might be erroneous.
For Spot colors preferably use References with spectral information
When only one or two colors are used in the Color bar, recognition might improve by setting a local config switch: Options.ProcessControl.ColorbarRecognition.SkipUndefined | value=1
After changing a Color bar from the Color bar editor, do not forget to save. The new settings are available after reloading the job.
Symptoms and possible solutions
Only one ink zone is scanned
Check if the number of rows is set to 1 in the Color bar definition. For ITX, the rows parameter should be 1 always.
Edit and save the Color bar definition to 1 row.
Reload the job before testing
Color bar scans fine, but in MeasureColor patches are recorded twice or skipped, and parts of the bar get shifted
Patch width is set too narrow or too wide, ITX head chops the patches erroneously
Measure the patch width by measuring the full bar with a ruler, and divide by the number of patches
Edit and save the Color bar definition with the new value for patch width
Reload the job before testing
Color bar scans fine, but the patch sequence is reversed
Change the trailing/leading setting in the device options dialog
ITX does not recognise the printed Color bar, no color bar found
ITX head is looking for a bar with a certain height, but the printed bar is another height
Check whether the correct MeasureColor Color bar definition has been selected
Check if the Color bar height is set correctly in the Color bar definition
Check if the image does not extend beyond the Color bar, recognition will fail
