The idea that the large pigment black cartridge is used for printing text and the small dye black cartridge is used for printing photos is common, probably because Canon makes comments like that but it is wrong. It has nothing to do with what is printed, only with what kind of paper you tell the printer you are printing on. If you tell the printer you are printing on plain paper, it will use the pigment black ink, it doesn't matter whether you are printing a photo or text. If you tell the printer you are printing on any kind of photo paper, it will use the dye black ink, it doesn't matter whether you are printing text or a photo.turbguy said:Your printer uses both a Pigment Black cart for text printing only, AND a black dye cart used during photo printing. We don't know what cart is giving you the problem, but I'm assuming it's not printing text. Am I right?