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RA-4 uses Color Developing Agent 3, [1] in combination with color couplers in the emulsion to generate color dyes. RA-4 is a standardized chromogenic process used worldwide to make prints with a variety of equipment, photographic paper, and chemicals. Kodak created the RA-4 process for its color negative photographic papers.
Richard Sewall Hunter (1909–1991) was a pioneering American color scientist and founder of Hunter Associates Laboratory (HunterLab). [1] [2] He is best known as the inventor in 1942 of the Hunter L,a,b color measurement system the precursor to the CIELAB color space. [3] [4] Hunter was awarded the David Richardson Medal in 1971 by the Optical ...
Hunter Lab (also known as Hunter L,a,b) is a color space defined in 1948 [1] [2] by Richard S. Hunter. It was designed to be computed via simple formulas from the CIEXYZ space, but to be more perceptually uniform.
CIELAB (any white point) is a supported color space in TIFF image files. [17] CIELAB (any white point) is available in PDF documents, where it is called the "Lab color space". [18] [19] CIELAB is an option in Digital Color Meter on macOS described as "L*a*b*". CIELAB is available in the RawTherapee photo editor, where it is called the "Lab ...
Paste paper used as a book covering, c. 1749. Paste paper is a type of surface design in which a colored, viscous media (generally starch paste) is applied directly to the surface of a paper sheet and modified with various tools and techniques to render an array of patterns and effects.
A national study discovered that teens in the United States consumed significantly less alcohol and drugs in 2024 compared to past years. Teen alcohol use has steadily decreased from 2000 to 2024 ...