Orthochromatic papers and films are also sensitive to yellow light and must be used only with a deep red safelight, not with an amber one.
12.
The top layer's colour is light-safe for orthochromatic films ( which are sensitive to blue light but insensitive to red light ).
13.
But panchromatic stock was more expensive, and not until the prices were equalized by competition in 1926 did it become used more widely than orthochromatic stock.
14.
Prior to 1921 Weston used an orthochromatic sheet film, but when panchromatic film became widely available in 1921 he switched to it for all of his work.
15.
Similar panchromatic film stocks were manufactured by Agfa and Path? the shift to panchromatic stocks had largely been completed by 1928, and Kodak discontinued orthochromatic stock in 1930.
16.
A bi-pack color process, the photographer loaded a standard camera with two film stocks, an orthochromatic strip dyed red, plus a panchromatic strip behind it.
17.
It is minimally expressed in the primitive and fetal definitive erythroid cells, but is highly expressed in adult definitive erythroid cells, particularly in the proerythroblast and the orthochromatic normoblasts.
18.
Orthochromatic film proved troublesome for motion pictures, rendering pink skies as perpetually overcast, blond hair as washed-out, blue eyes nearly white, and red lips nearly black.
19.
If the red channel is eliminated and the green and blue combined then the effect will be similar to that of orthochromatic film or the use of a cyan filter on panchromatic film.
20.
Subsequent differentiation stages ( proerythroblast to orthochromatic erythroblast ) involve a decrease in cell size and eventual expulsion of the nucleus, and are likely dependent upon EpoR signaling only for their survival.
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