This printer uses thermal paper, which uses BPA or BPS to develop the print, which rubs off easily [1]. BPA and BPS are absorbed into the body through the skin [2]. The amount used is 250-1000x the amount found in plastic bottles [3]. BPA and BPS are endocrine disruptors, and prolonged exposure to even low levels can result in severe endocrine and reproductive health issues (including birth defects); high levels are associated with a huge range of health issues [4].
Lobbying has clouded this issue in public perception [5]. But it's telling that supermarket cashiers have elevated levels of BPA in their systems, and the associated markers of health damage [6].
[1] https://www.webmd.com/cancer/news/20101207/bpa-can-rub-off-f...
[2] https://www.plasticpollutioncoalition.org/blog/2016/12/23/is...
[3] https://www.pca.state.mn.us/green-chemistry/bpa-thermal-pape...
[4] https://www.medicalnewstoday.com/articles/221205
[5] https://www.paperrolls.com.au/why-is-phenol-free-thermal-pap...