Main reason I’m not doing this myself. But maybe there is some miniature printer that isn’t BPA paper? I guess inject?
What about a tiny dot matrix printer? Is that a thing? It would be cool to have as part of a retro computing project.
I’ve seen some receipts whose paper it was printed on proudly stated to be BPA free, but for all we know it might use chemicals that are even worse for our health than BPA.
It's trivially easy to get BPA-free thermal paper now.