orthochromatic

American  

[awr-thuh-kroh-mat-ik, -thoh-kruh-] / ˌɔr θə kroʊˈmæt ɪk, -θoʊ krə- /

adjective

Photography.

1. representing correctly the relations of colors as found in a subject; isochromatic.

2. (of an emulsion) sensitive to all visible colors except red; isochromatic.

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orthochromatic British  

/ ˌɔːθəʊˈkrəʊməˌtɪzəm, ˌɔːθəʊkrəʊˈmætɪk /

adjective

1. Sometimes shortened to: ortho.  photog of or relating to an emulsion giving a rendering of relative light intensities of different colours that corresponds approximately to the colour sensitivity of the eye, esp one that is insensitive to red light Compare panchromatic

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Other Word Forms

• orthochromatism
  noun

Etymology

Origin of orthochromatic

First recorded in 1885–90; ortho- + chromatic

Example Sentences

He had devised a solution that could keep her blue eyes from turning white on camera, a problem caused by the blue-sensitive orthochromatic film used at the time.

From New York Times • May 27, 2022

If we went with true orthochromatic, we would have used a deep blue filter.

From The Verge • Oct. 18, 2019

You spoke at the Q&A about using orthochromatic film, which I had to look up.

From The Verge • Oct. 18, 2019

They don’t they don’t make orthochromatic motion picture film anymore.

From The Verge • Oct. 18, 2019

This prohibition was the more to be regretted because no other commercial isochromatic or orthochromatic plates had or have appeared to possess the same qualities of translation.

From The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years by Werge, John