Orthochromatic definition

ôrthō-krō-mătĭk
Of, relating to, or accurately reproducing the colors of the subject.
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Sensitive to all colors except red.

Orthochromatic film.

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Designating or of photographic film that is sensitive to all colors except red and deep orange.
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Of, relating to, or accurately reproducing the colors of the subject.
adjective
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Sensitive to all colors except red.

Orthochromatic film.

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Being uniformly sensitive across the entire visible range, and thus reproducing colours faithfully.
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(photography) Sensitive to all colours except red.
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Origin of orthochromatic