Each sheet of film is sealed in a light-tight envelope. With high-energy emitters, the film may be exposed directly through the envelope without the use of exposure cassettes or holders.. Coated with emulsion on both sides of the clear base. Recommended for chemiluminescence. Very versatile for autoradiography with high or low energy isotopes. Sensitivity can be increased with intensifying screens when using low-energy isotopes. When handling film in a darkroom, Kodak LED Safelight Darkroom Illuminator is recommended. Sigma-Aldrich F5763-50EA Carestream Kodak BioMax XAR Film, 8" Width, 10" Length, Pack of 50. Country of Origin : United States. Part Number : 1186U54EA. Pack of : 50.