This thermal paper from Germany which another commenter mentioned upthread https://www.oekobon.de/ https://www.oekobon.de/ claims "no BPA/BPS" and "phenol-fre

This thermal paper from Germany which another commenter mentioned upthread https://www.oekobon.de/ https://www.oekobon.de/ claims "no BPA/BPS" and "phenol-free". (Hopefully that doesn't turn out to mean that they found something even worse to make it out of!)