How To Use Orthochromatic film In A Sentence

• Orthochromatic film was only sensitive to the brightest natural light.
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• Orthochromatic films are not sensitive to red light at all, and may be developed under a red safelight.
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• Even the orthochromatic films were not sensitive to red light.
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• Even the orthochromatic films were not sensitive to red light.
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• I use traditional panchromatic films for the interpositive and an orthochromatic film for the final enlarged negative.
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