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Harry Potter's diary provides inspiration for self-writing blood paper

  • A self-writing diary featured in JK Rowling’s Harry Potter series has inspired researchers to create a paper that spells out a person’s blood type.

    A team at Australia’s Monash University has developed the paper-based sensor that interprets blood type as text.

    The sensor could prove to be beneficial to non-experts especially during events such as emergencies and humanitarian disasters that require quick results.

    The device works in line with the ABO system and classes blood samples as A, B, AB or O types and spelling out whether the type is Rhesus positive or negative.

    An A or B letter indicates the antigens present in the red blood cells while people with O blood type have no antigens at all.