Color Processes and Materials
Color Processes |
Each color is composed of equal amounts of the adjacent color
Each color is complementary to the color that is opposite
With the additive process, separate colored lights combine to produce other colors. Process found in televisions.
Additive primary colors are Red | Green | Blue
With the subtractive process, colors are produced when a dye or pigment absorbs some colors of the spectrum and passes on only part of the spectrum. All modern photographic materials utilize the subtractive process.
Subtractive primary colors are Yellow | Cyan | Magenta
Color Materials |
- Produces an image that is the opposite in colors and density of the original scene
- C-41 process
- Advantages in using include greater exposure latitude and lower film and processing costs
- Disadvantages include the need for color darkroom or film scanner for image processing and photographic prints
- Produces an image with the same colors and density of the scene
- E-6 process
- Advantages in using include true replication of scene and the ability to see the image once processed
- Disadvantages include higher film and processing costs, minimal exposure latitude and color darkroom or film scanner for making photographic prints
- Produces an image with relatively the same colors and density of the scene
- Advantages in using include no need for analog color darkroom processing equipment and materials
- Requires the need and use of digital imaging technology and equipment to post-process images, including computer, image processing software and a digital output device such as an inkjet printer
Color Film Structure
Color film consists of three layers of emulsion, each sensitive to blue, green and red. During exposure, light from each color produces a latent image on the emulsion layer, resulting in three superimposed latent images. During development, each latent image is converted into a metallic silver negative image.
With a color negative image, a colored dye is combined with each black and white negative image. The dyes are cyan, magenta and yellow (complements of red, green and blue) The silver images are then bleached out, leaving the three layers of negative dye images. The color negative has an overall orange color or “mask” to compensate for color distortions that would occur in printing.
The positive color image of a transparency is created by a reversal process.
Color Temperature and the Color of Light
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