from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Photography Of, relating to, or accurately reproducing the colors of the subject.
- adj. Photography Sensitive to all colors except red: orthochromatic film.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Being uniformly sensitive across the entire visible range, and thus reproducing colours faithfully
- adj. Sensitive to all colours except red
from The Century Dictionary and Cyclopedia
- In photography, correct in the relations or in the rendering of colors — that is, free from the usual photographic fault of exaggerating the deepness of greens, yellows, and reds and the brightness of blues and violets.
- Staining in the exact shade of color of the dye used.
- n. An orthochromatic plate; a photographic plate the sensitiveness of which is so distributed throughout the spectrum as to give in the image a normal gradation of light and shade.
Upon plates rendered "orthochromatic" by staining with alizarine, or other dye-stuffs, the whole visible spectrum can now be photographed; but those with their maximum of sensitiveness near G are found preferable, except where the results of light-analysis are sought to be completely recorded.
Her retinas expanded and her eyes looked normal to the orthochromatic film.
Even on orthochromatic stock, the warmth of it survived in black and white, though the film was never released, of course.
There was no retouching of any kind, and I think the print shows the value of using a color filter with an orthochromatic plate where colors are contrasted in the subject.
Experiments will also be tried with orthochromatic plates and the use of
But in portraiture, as well as in landscape photography, recourse must also be had to orthochromatic plates to obtain effective pictures, particularly as plates can now be produced in which the relative sensitiveness closely resembles that of the ordinary emulsion plate.
There are many ways of producing an orthochromatic effect; one is the use of a glass tank placed behind or in front of the lens, in which a coloring matter from either a vegetable or mineral product is placed; this tank or cell is, however, only for use in the studio, as for outdoor photography we have a colored glass screen, so as not to be bothered with carrying colored solution.
One of the best orthochromatic effects made through this tank is with
The exposure through the yellow screen with an erythrosine plate is about the same as if you had no orthochromatic plate -- a plain plate instead -- provided you are not using too dark a yellow on your screen.
I will give to a common plate about four seconds, an orthochromatic plate under the same conditions five seconds.