This is the same for professional printers too. A friend of mine has a side business printing signs and has a large format Epson (I think?) printer. It takes so

This is the same for professional printers too. A friend of mine has a side business printing signs and has a large format Epson (I think?) printer. It takes something like 12 inks and has options for chrome and other niche colours. During 2020 there was a shortage in my country of inks, no local suppliers - official or unofficial - had any. He found some on eBay from another EU country, but when they arrived the printer wouldn't accept them. Apparently the inks are region locked, and the only way around it would be replacing the main board of the printer to change it to the other region.