The director is best known for his films such as "Cheeni Kum", "Paa", "Shamitabh" and "Ki and Ka".
"Padman", featuring Akshay Kumar in the lead, is a fictionalised account of Tamil Nadu-based Muruganantham, who created affordable sanitary napkins for the women of his village.
"I never wanted to do a biopic. I wanted to do my own fictional stories but this subject was great. This guy's life is fascinating. Where will you get to do a mass mainstream film on a subject like sanitary pads? I felt it was a fantastic opportunity, that's why I took it up," Balki told PTI.
The director said he took liberties in the portrayal of the character but did not alter the essence.
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"I have to do justice to his (Muruganantham) life. On screen, his life should be even better than what it was in real life. I have taken very few liberties and Muruganantham knows about it."
"Padman" was always the title for Balki as that is how he started writing the story.
Also featuring Sonam Kapoor and Radhika Apte, the biographical comedy-drama is set for release on January 26.