The bidders are also required to certify that the polymer substrate supplied to BRBNMPL does not contain animal tallow or its DNA. The Indian Express report noted that controversies surrounding the presence of animal tallow in banknotes in countries such as the UK have been cited as one factor behind concerns over the introduction of polymer currency in India. BRBNMPL’s EOI indicated an approximate requirement of 68,000 reams of polymer substrate. Each ream is to contain 500 sheets of polymer film, with bidders required to submit samples as part of the qualifying process.