10/4/2023 0 Comments Kodak photo print sizes![]() In order to make this task easier he sought an organic compound whose oxidized form was both colored and insoluble. Specifically he wanted to determine whether the latent image acted as an oxidizing agent in relation to organic compounds other than typical photographic developers. Around 1906, Homolka was investigating the nature of the latent image. Perhaps the earliest suggestion for using oxidized developer to create color comes from Dr. In chromogenic processes, this oxidized developer is used for the image-wise creation of color dyes. In black and white photography this oxidized developer has no purpose, and is simply washed out of the print as a chemical by-product of the development process. The critical step in silver halide photography that we are concerned with here is the developing step:ĭeveloper + Silver halide → Oxidized developer + Metallic Silver History and TechnologyĬhromogenic photography is based on silver halide technology, so much so that color prints are often referred to as silver halide prints in industry. NOTE: All references to chromogenic prints in this study refer to Kodak’s coupler-incorporated print materials that were sold under the Kodacolor and Ektacolor names beginning in 1942. Aspects of support, dye cloud structure, layer order, backprinting and stamps, dye and coupler stability, and fluorescence will be examined in detail. amateur photofinishing market.Ī general introduction to the history and technology of chromogenic materials will lay the foundation for an understanding of print characteristics. ![]() By 1960, color photography overtook black and white in the U.S. Issues with color rendition and extremely poor dye stability plagued the process in its early years, though technological innovations led to gradual improvements in print quality and stability. One of the innovations of this new process was the use of coupler-incorporated negative film and print materials. The process, which produced fiber base color prints from color negatives, was dramatically simpler and cheaper than previous alternatives. The era of the color snapshot began in January 1942 when Kodak introduced Kodacolor-the first consumer-oriented mass production negative/positive color print process. Subsequent findings from this inquiry significantly add to the knowledge about these ubiquitous yet rarely studied photographic prints. The documentation of these changes over time made it possible to date nearly any print to within a few years. Changes in the print characteristics over time were documented and when possible, correlated to known technological developments. The prints were documented overall and in cross-section under both visible and UV radiation, using an Olympus AX-70 compound microscope, and a Canon EOS 5D digital SLR. The following aspects of the prints were examined: support, dye cloud structure, layer order, backprinting and stamps, dye and coupler stability, and fluorescence. Introduced in 1942 and still manufactured today, samples of these prints from intervals across the manufacturing history were studied in detail in order to gain a fuller understanding of the material characteristics of this photographic process. and their coupler-incorporated chromogenic print process, were nearly synonymous with the 20th century color snapshot. Presented at the 2009 PMG Winter Meeting in Tucson, Arizona Abstract 67-82) Chromogenic Characterization: A Study of Kodak Color Prints, 1942-2008 Gawain Weaver and Zach Long Topics in Photographic Preservation 2009, Volume 13, Article 13 (pp. Topics in Photographic Preservation, Volume 1.
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