Alas, that never materialized as the in-person campaign I was DMing fizzled out.

> If you must give paper receipts, look for “phenol-free” paper, which is safer for human health and has fewer environmental effects. Three types that do not contain BPA or BPS and are competitively priced contain either ascorbic acid (vitamin C), urea-based Pergafast 201, or a technology without developers, Blue4est. The latter uses a coating that reveals an underlying dark layer when heat is applied.

> Companies that offer phenol-free alternatives: ...

I remember I enjoyed the simple typewriter behavior of connecting them to a computer db9 cable and using the terminal that used to come with windows to type out directly in the paper something short. I think this app had a red phone as icon or something like it (and there was a reimplementation later with a donkey on the icon).