Process ID Chart: Color Photographic Prints (PDF)

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Process ID Chart: Color Photographic Prints (PDF)

Process ID Chart: Color Photographic Prints SUBTRACTIVE COLOR R C M Photographic prints combine the subtractive colors (cyan, magenta, and Y yellow) to create all colors. Subtractive dyes or pigments are present in every color print, usually in very thin discrete layers. The order of the G CMY layers varies between processes. The earliest color prints used three B+W negatives exposed through red, green, and blue filters. The red record negative would be used to print the cyan image, the green record for the magenta image, and the blue record for the yellow image. B These color separation negatives were eventually combined to create integral color films, allowing for simpler one-step color photography. THREE-COLOR ASSEMBLY DYE DESTRUCTION PRINT PRINT Cibachrome, 1967-1992 Tri-color Carbro Print, 1919-1950 Ilfochrome Classic, 1992-2012 • Three pigmented gelatin layers (CMY) • 3 dye layers (CMY) • Differential gloss • Bleach halos @100x • Pigment particles @100x • Good dye image stability • Very stable color pigments • Black borders common • Supports: • Cellulose Triacetate 1967- as viewed @ 100x as viewed @ 200x • Resin-coated 1979-2005 • Polyester 1980-2012 DYE IMBIBITION PRINT DYE COUPLER PRINT Eastman Wash-Off Relief Print, 1935-47 Kodacolor/Ektacolor, 1942-Present Kodak Dye Transfer Print, 1946-1994 Fujicolor, Agfacolor, et al • 3 dyes in single gelatin image layer (CMY) • 3 dye layers (CMY) • No differential gloss • Dye clouds @100x • Diffuse color dyes @100x • Dye image stability varies • Stable color dyes • Kodacolor print supports: • Support: Fiber-base • Fiber-base 1942-68 • Resin-coated 1968-present as viewed @ 100x as viewed @ 200x • Acetate and polyester also exist gawainweaver.com | [email protected] © 2020 Gawain Weaver. All Rights Reserved..

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OSHER Color 2021
OSHER Color 2021 Presentation 1 Mysteries of Color Color Foundation Q: Why is color? A: Color is a perception that arises from the responses of our visual systems to light in the environment. We probably have evolved with color vision to help us in finding good food and healthy mates. One of the fundamental truths about color that's important to understand is that color is something we humans impose on the world. The world isn't colored; we just see it that way. A reasonable working definition of color is that it's our human response to different wavelengths of light. The color isn't really in the light: We create the color as a response to that light Remember: The different wavelengths of light aren't really colored; they're simply waves of electromagnetic energy with a known length and a known amount of energy. OSHER Color 2021 It's our perceptual system that gives them the attribute of color. Our eyes contain two types of sensors -- rods and cones -- that are sensitive to light. The rods are essentially monochromatic, they contribute to peripheral vision and allow us to see in relatively dark conditions, but they don't contribute to color vision. (You've probably noticed that on a dark night, even though you can see shapes and movement, you see very little color.) The sensation of color comes from the second set of photoreceptors in our eyes -- the cones. We have 3 different types of cones cones are sensitive to light of long wavelength, medium wavelength, and short wavelength.
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