are combined. When these films are manufactured, the
overall thickness of the film is reduced By reducing the
overall thickness, you also reduce the scattering of light
within the film, resulting in improved sharpness. Also,
double-emulsion layers, one fast and one slow, may be
incorporated to improve film speed in color films.
emulsion during processing. A dye coupler is a chemical
that produces a dye by combining with the oxidized
products that occur during color developer.
scene-the same as a black-and-white negative film.
Color films can be recognized because they contain the
suffix "color," such as Vericolor, Kodacolor, and
Fugicolor. These color films are used when a print is the
final product. Most color negatives (other than color
film used for aerial photography) have an orange mask
This orange mask increases the color separation that
reproduces colors more accurately in the final print.
original scene; for example, a red object in the scene is
recorded as cyan in the negative. It is a combination of
yellow, magenta, and cyan that records all the other
colors that you see in the scene. Color dyes in the
emulsion layers control the colors of light passing
Color negatives can also be printed on a special
brightnesses of objects and in the same colors as those
in the original scene. Reversal films are recognized by
the suffix "chrome" in their names, such as Ektachrome,
Kodachrome, and Fujichrome.
of the portions of the silver halide emulsions that were
not affected by camera exposure or the first
black-and-white developer. Like color negative film,
color reversal film has three emulsion layers that are
sensitive to blue, green, and red light and produces
yellow, magenta, and cyan dyes, respectively. The film
contains dye-forming chemicals that are put into the
emulsion layers during manufacturing. A color
developer produces three dye images in the emulsion
layers. The three dye images in a developed color
reversal film control the colors of light passing through
during processing from three separate color developer
solutions. Kodachrome film has high resolving power
Kodachrome film is a complex operation and can only
onto a color reversal paper, copied on a black-and-white
film for producing black-and-white prints, or copied to
a color internegative (copy negative) for producing
This means that when the color print or slide looks
correct, color balance has been achieved.
exposure with a specific Kelvin temperature (K).
Remember, daylight usually has a higher content of blue
light than red light, while tungsten illumination usually
has a higher content of red light than blue light. To
daylight, the manufacturer balances color films for
daylight, so they have a higher sensitivity to red light
than to blue light. To compensate for the lower
proportion of blue light in tungsten illumination, the
illumination, so they have a higher sensitivity to blue
use without filters. Specifically, daylight films are
balanced for use in sunlight or with an electronic flash
Basic Photography Course