This chart has been photographed in the orthochromatic and also in the ordinary way.
orthochromatic results exhibited by Dixon and Sons at the photographic exhibition in October.
In actual practice an orthochromatic mixture of frequencies is used to give a black, gray and white picture.
The isochromatic and orthochromatic plates on the market are corrected, and are the best to use.
I will give to a common plate about four seconds, an orthochromatic plate under the same conditions five seconds.
On the few occasions when orthochromatic plates are used the lamp need not be lighted.
orthochromatic or·tho·chro·mat·ic (ôr'thə-krō-māt'ĭk)
Staining with the same color as that of the dye used. Used of a cell or tissue.