Screen Printing Film is a transparent sheet used to create stencils for the screen printing process. Designs are printed onto the film in opaque black ink, forming a positive image that blocks light during exposure. When placed on a coated screen and exposed to light, the covered areas remain soft while the exposed areas harden, creating a precise stencil. This allows ink to pass only through selected parts of the mesh during printing. Screen printing film is essential for achieving sharp details and accurate reproduction, making it widely used for textiles, posters, packaging, and various custom printing applications.