They can, yes. Here's a HP doc on 5 color ones with photo cartridge that are fairly common: https://support.hp.com/us-en/document/c01839024 https://support.hp.c

They can, yes. Here's a HP doc on 5 color ones with photo cartridge that are fairly common: https://support.hp.com/us-en/document/c01839024 https://support.hp.com/us-en/document/c01839024 Light cyan and light magenta are usually the additional colors added https://www.macworld.com/article/152010/6inkhetprinters.html https://www.macworld.com/article/152010/6inkhetprinters.html There are 7 color printers from Epson that add a dilute black.