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With each of my inkjet photo printers I make a series of tests - printing two copies of a composite image on one sheet of A4 paper. Each sheet I then cut in half - one half is used for the fade test and the other for this quality test. Print quality is judged after a few days, as over the first 24 hours, subtle changes in colour balance and Dmax - the deepest black - occur. These changes are in fact a problem with all printers. You can’t judge the colour quality immediately the print is produced. Some change more than others. Canon prints on some papers emerge looking slightly flat and with a magenta colour cast, but, after about 20 minutes, the magenta fades, the blacks deepen and you start to see the real result. So if you’re making your own tests, or printing some really important photographs, wait at least 15 minutes, longer if possible, before making any fine adjustments to colour.
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