A type of photographic film which is only sensitive to light in the blue portion of the visible spectrum (or, in other words, light having a wavelength between 450 and 500 nanometers) and in the ultraviolet portion of the spectrum. Also known as color blind film, blue-sensitive film—unlike orthochromatic and panchromatic films—can be used somewhat safely outside a darkroom, and is often used for photoimaging utilizing ultraviolet light.

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