BPA (Bisphenol A) on Thermal Paper

BPA (Bisphenol A) and BPS (Bisphenol S) are chemicals historically used in thermal paper coatings as the "developer" — the substance that reacts with the leuco dye when heated to produce dark print.

Studies have raised health concerns: BPA is an endocrine disruptor and can transfer from receipt paper to skin in measurable amounts, particularly when hands are damp or oily. People who handle hundreds of receipts daily (cashiers, bartenders) can have elevated BPA levels.

In response, many manufacturers now produce BPA-free thermal paper using alternative developers (e.g., D-90 or color-developer chemistries that don’t use bisphenols). Major retailers including Target, Trader Joe’s, Whole Foods, and most pharmacies have switched to BPA-free paper.

There’s no visual difference between BPA and BPA-free thermal receipts — they look and behave identically. The distinction matters only for the people printing/handling them in volume.