Thermal Paper -- BPA FREE
When shopping at supermarkets or checking in for train rides, one is often given a thin receipt. These seemingly ordinary pieces of paper have become a source of apprehension for many due to a rumor that "receipts contain bisphenol A (BPA) and may be carcinogenic." To verify the veracity of this claim, it is essential to delve into the "mysteries" of thermal paper.
Thermal paper is a specialized printing medium coated with a layer comprising colorless dyes, developers, and sensitizers. When the high-temperature components of a thermal print head come into contact with the paper, the instantaneous heat triggers a chemical reaction between the colorless dyes and developers in the coating. Their reaction forms dark organic compounds, allowing text and patterns to form. This ink-free process is both eco-friendly and efficient, explaining its extensive application in various ticket printing, such as China credit card paper rolls,cash register receipts, bill papers, Atm Transaction Slips, and thermal waybills for express deliveries. In the color development reaction of thermal paper, BPA has historically played a pivotal role. As a common organic compound, BPA functions as a developer in thermal paper, rapidly reacting with colorless dyes upon heating to form stable dark substances, ensuring clear and long-lasting text and patterns. In traditional BPA-containing thermal paper, BPA concentrations typically range from tens to hundreds of micrograms per gram of paper.
While BPA is an environmental hormone that may disrupt the human endocrine system and pose potential carcinogenic risks when ingested in excessive amounts, the amount of BPA absorbed via contact with receipts is extremely small. BPA primarily exists in a solid state within the thermal paper coating and only migrates to the skin surface in small quantities under specific conditions, such as high temperatures or prolonged contact with oily substances. Furthermore, the stratum corneum of human skin serves as a natural barrier, blocking most BPA from entering the body. In daily life, avoiding repeated rubbing of receipts and washing hands promptly after contact can minimize exposure risks.
In response to growing health and safety concerns, China promulgated the national standard GB/T 28210-2024 Thermal Paper on March 15, 2024, which will enter into force on April 1, 2025. This standard stipulates that BPA content in thermal paper shall not exceed 200 milligrams per kilogram, aligning with European Union standards. Researchers and enterprises are actively exploring new technologies. To allay consumer concerns, BPA-free thermal paper has been developed, maintaining printing quality while significantly reducing health risks. Currently, many large supermarkets, banks, and transportation authorities have gradually adopted BPA-free thermal paper to safeguard consumer health. As a BPA Free Receipt Paper manufacturer, we strictly comply with national standards, prioritize health and safety, and undertake due social responsibility.
Thus, the next time one receives a shopping receipt, there is no need for unwarranted alarm. By understanding the underlying scientific principles, we can embrace the convenience of modern life while effectively mitigating potential risks.