I am curious why my Canon printer, an MG6320 (but I have also seen this on MG5320 and MG5220), requires me to use two black ink cartridges, one labeled BK and the other labeled PGBK. When I do a nozzle check, the one labeled BK prints a grid, while the one labeled PGBK prints a black rectangle. Which one is used for which purpose?
The PGBK (PaGe BlacK or PiGmented BlacK) ink does not adhere well to coated stock.
So that ink is used for regular printed documents.
In contrast, the BK cartridge holds dye-based black ink that is designed to last longer and retain its color longer when printed on coated photo paper.
So it is used for photos.
protected by Community♦ Oct 24 '17 at 9:12
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