What is "orthochromatic"

Usage examples of "orthochromatic".

In actual practice in orthochromatic mixture of frequencies is used to give a black, gray and white picture.

Even on orthochromatic stock, the warmth of it survived in black and white, though the film was never released, of course.

I never did get straight on what Orthochromatic means, but it was very trendy.

So the tenure-jockeys and critics who were hailing this millennial new Orthochromatic Neorealism thing as the real new avant-garde thing were getting tenure by blasting Dick and Godbout and the flying Snow Brothers and The Stork for trying to be avant-garde, when really they were self-consciously trying to be more like après-garde.

The plates sandwiching the ash were then put into a printing frame and the suspect matchbook was photographed on an orthochromatic plate and printed on compression paper.