There is apparently a printer that can use spent coffee or tea leaves to print. I love this idea but I would not buy a printer when so many are being thrown away. I pull them out of dumpsters with intent to repair them. So the question is, can they be hacked to work with coffee or tea?
Canon actually disclosed how to hack their cartridges as a consequence of a semiconductor shortage due to coronavirus. So this suggests #Canon could be a candidate for this hack. Has anyone tried it? How precisely do we have to match the viscosity of homemade ink to the original ink?
I think the main problem with this idea is that the only real reason to print something these days is to store some important info offline for a longer period of time. This means the color in the ink needs to be especially resistant to degradation, so that even many years later the text is still readable.
I’m printing stuff every week and it need not be archive quality. Examples: