Rubylith Red Masking Film 22" X 28"

Rubylith® is a well-known red masking film designed for light-safe applications in screen printing, graphic arts, and photography. The material features a thin, red film layer that can be precisely cut with a knife, mounted on a clear polyester backing. It is widely used for hand-cut stencils and for producing photo-positives by blocking UV light during exposure on orthochromatic materials."