New Delhi: The government has approved the introduction of one billion polymer banknotes of Rs 10 and Rs 20 each for field trials, Parliament was informed on Tuesday, August 11. As per the RBI, these polymer banknotes are proposed to be issued along with paper substrate-based banknotes,” she said. The RBI has informed us that the procurement process is presently at an initial stage, she said. Therefore, she said that, at this point, it would not be practicable to determine the exact timeframe for the introduction of polymer banknotes or the expenditure likely to be incurred thereon. However, she said, it is still below the Reserve Bank of India’s inflation target of 4 per cent.