The myFirst Camera Insta 2 trades instant film and proprietary colored thermal paper for the same stuff that cash registers spit out en masse: simple black and white thermal paper.

“Thermal paper bills are not conducive for business,” says Rajendran. “We often have to reimburse employees for their travel, stay, food and transport.

A study surveying companies in the EU found that at least half of them are using thermal paper. The research is having an impact; some retailers have begun introducing receipts that are BPA and ...