There are no ink cartridges in the Sprocket devices. It is the zink - Zero ink technology. You can read about this in detail here: https://techwatch.de/reviews.... Apart from that, the Sprocket is one of the most expensive mini photo printers in terms of follow-up costs. The paper is even more expensive than that of the competition, and they are already charging reasonable prices. Unfortunately, only the paper for the larger version is available here at Galaxus. You're sure to find the smaller ones elsewhere.

It doesn't need any. The colour comes from the expensive paper :)