“Most common types of thermal paper contain BPA or BPS” That's not valid everywhere.
The European Union decided in 2016 to forbid the use of BPA in thermal paper. [1] BPA is currently still used but will be completely banned in 2020. And, even if BPS will be allowed, EU surveys seem to show that alternatives to BPA/BPS are being considered for thermal paper.
I mean, good for them, but if BPA is "still currently used" and alternatives to BPS are only "being considered", then in the EU both BPA and BPS are still in thermal paper right now, yes?
So, in fact, it is valid to say that "most common types of thermal paper contain BPA and BPS."
The European Union decided in 2016 to forbid the use of BPA in thermal paper. [1] BPA is currently still used but will be completely banned in 2020. And, even if BPS will be allowed, EU surveys seem to show that alternatives to BPA/BPS are being considered for thermal paper.
[1] https://echa.europa.eu/hot-topics/bisphenol-a