) The black ink in Canon inkjet printers used for regular printed documents. The PGBK pigmented ink does not adhere well to coated stock. In contrast, the BK cartridge is used for photos. It holds dye-based black ink that is designed to last longer and retain its color longer when printed on coated photo paper. See inkjet cartridge
Page Black and Black
Used for regular document printing, the page black ink cartridge (PGBK) has twice the capacity of photo black (BK).