ISLAMABAD: Pakistan Polypropylene Woven Sack Manufacturers Association (PPWSMA) has requested Prime Minister Shehbaz Sharif to make QR-Code printing on plastic bags to ensure their recycling. In a ...
It's the invisible ink of childhood, all grown up and with a serious purpose. Researchers have developed a high-tech ink, which they used to print QR (quick response) codes that are invisible in ...
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