He is famous as a founder of National Film Archive of India.The fact that "Dadasaheb Phalke" is recognized today as the father of Indian cinema is Nair’s doing. He tried to save any film that he could get his hands on, be it world cinema, Hindi popular films or regional Indian cinema. He even took world cinema to the villages of India. A documentary film "celluloid man" directed by Shivendra Singh Dungarpur came in the year of 2012 that was the reason why P.K. Nair also know as celluloid man.