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Open Printer is a fully open-source inkjet with DRM-free ink and no subscriptions
(www.techspot.com)
this post was submitted on 05 Oct 2025
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They will use CC BY-NC-SA 4.0. Which means it's not open source, and no-one else can sell replacement cartridges, parts etc.
It might still be a good printer and enjoyed by some, but it really annoys me when companies mix these terms up, almost certainly deliberately.
The only complex part of the hardware is the HP cartridge controller, and you have at least part of the work here: https://hackaday.io/project/176931-hp-printer-cartridge-control-module/details