Eliminating materials of concern in thermal printing paper
When paying for your groceries, do you also ask for the receipt? Receipts are normally printed on thermal paper. Conventional thermal papers use bisphenol A (BPA) or replacements such as bisphenol-S (BPS) to produce images when heated. The public has raised concerns, however, about the safety of BPA for human health and the environment. An EU-wide restriction on the use of Bisphenol-A in thermal paper has been in effect since January 2020.
The chemical industry is always exploring ways to improve the safety of products. Dow invented a paper coating technology that eliminates the need for reactive chemical developers such as BPA or BPS. This paper retains the printing compatibility of the new thermal paper in existing printers. The technology relies solely on air-voids in the coated thermal paper to form an image.
Paper receipt images produced using this technique resist fading longer due to their improved light stability. The sustainable thermal paper option free of chemical developers used for food contact applications is already available from commercial sources.
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