CARBON PROCESS
Car"bon process. (Photog.)
Defn: A printing process depending on the effect of light on bichromatized gelatin. Paper coated with a mixture of the gelatin and a pigment is called carbon paper or carbon tissue. This is exposed under a negative and the film is transferred from the paper to some other support and developed by washing (the unexposed portions being dissolved away). If the process stops here it is called single transfer; if the image is afterward transferred in order to give an unreversed print, the method is called double transfer.
CARBON STEEL
Carbon steel.
Defn: Steel deriving its qualities from carbon chiefly, without the presence of other alloying elements; —opposed to alloy steel.
CARBON TRANSMITTER
Carbon transmitter.
Defn: A telephone transmitter in which a carbon contact is used.
CARBONYL
Car"bon*yl, n. Etym: [Carbon + -yl.] (Chem.)
Defn: The radical (CO)'\'b7, occuring, always combined, in many compounds, as the aldehydes, the ketones, urea, carbonyl chloride, etc.
Note: Though denoted by a formula identical with that of carbon monoxide, it is chemically distinct, as carbon seems to be divalent in carbon monoxide, but tetravalent in carbonyl compounds. Carbonyl chloride (Chem.), a colorless gas, COCl2, of offensive odor, and easily condensable to liquid. It is formed from chlorine and carbon monoxide, under the influence of light, and hence has been called phosgene gas; — called also carbon oxychloride.
CARBORUNDUM
Car`bo*run"dum, [Carbon + corundum.]