Arc lamp
A photographic lamp. The lamp consists of two electrodes typically made of tungsten which are separated by a gas.
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More Photographic Terms ...
arc lamp
refer to carbon arc.
arc resistance
the resistance to current flow across the surface of the material measured as the time required for an arc to establish a conductive path in a substance.
Arc lamp - photographic lamp in which light is produced by passing an electric current through two carbon rods.
Argentotype - Mid-19th century silver print process, on which the kallitype and sepia paper processes are based.
HMI (Halide Metal Oxide) lamps are small, very expensive arc lamps that generate four or more times the light of tungsten bulbs with less heat. The light is also perfectly daylight balanced.
-Carbon arc - see Arc lamp.
-Carbon process - contact printing process, introduced in 1866, using tissue coated with pigmented gelatin. The paper was sensitized in potassium bichromate and contact printed behind a negative in sunlight.
Zirconium lamp
is an arc lamp used in powerful enlarges and projectors.
 See also: Lamp, Photograph, Meter, Normal, Temperature
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