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orthochromatic film

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Noun1.orthochromatic film - a photographic film sensitive to green and blue and violet light
photographic film, film - photographic material consisting of a base of celluloid covered with a photographic emulsion; used to make negatives or transparencies
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This is referred to as panchromatic film and is used today for all except special applications where orthochromatic film has advantages.
A bit of history--film--back then by Patti, Tony / PSA Journal
Orthochromatic film is sensitive to the blue to yellow region of the spectrum and panchromatic extends sensitivity to red.
Pictorial photography with infrared film by Banerjee, Debidas / PSA Journal
Five years ago, the photographic amateur --the box camera or folding Kodak enthusiast, had orthochromatic film, a fairly wide group of lenses, shutters, and film sizes to choose from, and several kinds of developers and enlarging equipment with which to work.
The Journal marks sixty years of PSA by Hindman, Byron; Matthews, G.E.; Chatto, Byron H.; Thorek, Max / PSA Journal
 
 
 
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