What would you do to reduce darkness on a duplicate film?

To reduce darkness on a duplicate film, first assess the exposure settings used during the original filming; adjusting these settings in the future can help prevent similar issues. In post-production, you can use software to increase brightness and contrast, or apply exposure adjustments to enhance visibility. Additionally, consider using filters or lighting techniques during the shooting process to improve the overall lighting conditions for future projects. If the film is already developed, you may also explore reprinting with adjusted exposure settings.