Why does my Canon inkjet printer require two black cartridges?

printer inkjet-printer canon-pixma

Solution 1:

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.

Source

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