This is why You have likely been exposing yourself to cancer and hormonal disruption unknowingly
Bisphenol A (BPA) is a chemical used in thermal paper receipts to develop color. BPA is an endocrine disruptor, which means it can disrupt hormones and may contribute to cancer. Some researchers believe that cash register receipts are the primary source of BPA exposure for most people. One study found that thermal receipts can contain 250–1,000 times more BPA than a can of food. Another study found that 80% of receipts from major retailers and restaurants contain BPA and bisphenol S (BPS). To avoid BPA exposure, you can try to minimize or avoid touching receipts. You can also avoid hand-to-mouth contact after handling a receipt. You can determine if a paper is thermal by scratching it with your fingernail. Thermal paper has a chemical coating that generates heat when scratched, which produces black marks.