Jaya Bhaduri was signed as the heroine. Her role was as strong as that of the hero. The movie needed a middle aged actor to play the estranged husband. None of the top heroes of the time who were in that age bracket (Sunil Dutt, Rajendra Kumar, Dev Anand) would shed their image and act in the movie The newer entrants to middle road cinema (Vijay Arora, Romesh Sharma, Anil Dhawan) were considered too young to depict the maturity required of the role. That is when director Vijay Anand was signed. The only other alternative was Sanjeev Kumar but he was extremely busy with Mausam, Sholay and a host of other movies at the time. The movie was a hit and Vijay Anand followed it up with another heroine-dominated movie Main Tulsi tere aangan ki which also went on to become a hit.
This was the only film for which Kalyanji - Anandji won a Filmfare Award for Best Music Director.
Vijay Anand stated "Even my Kora Kagaz had not inspired enough confidence in the trade prior to its release. The film's producer nervously came to me and said, 'The film is not getting sold. You must re-edit the film, or do something so that I'll be able to sell it.' Just one song from that film became such a huge hit that it carried the entire film on its own."
This film was later remake about some 30 years later with some changes as Chalte Chalte by Sharukh Khan.
Kora Kagaz, incredibly, almost didn't get made. Just before the film was to go on the floors, the financier backed out. Vijay Ganguly recounted the incident: "Now after 14 years of struggle, he gets his first film and one day before the mahurat, the financier backs out. He [Anil Ganguly] was, like, my life is ruined."Anil went to the financier's house and tried to reason with him. But he did not relent."The whole night [father] was standing down [outside the financier's house] and the financier kept looking that he wasn't going," Vijay continued. "He came down after a couple of hours and