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⭐ In the context of Ilfochrome printing, Henry Wilhelm is considered…

Henry Wilhelm conducted accelerated aging tests on Ilfochrome prints, demonstrating their ability to retain color accuracy for a significant period when framed, thus establishing his role in evaluating the process's long-term preservation capabilities.

⭐ Core Definition: Henry Wilhelm

Henry G. Wilhelm is an American researcher and author known for his studies of the archival properties of photographic printing processes. In 1981, he received a Guggenheim Fellowship in Photographic Studies to continue his work studying photographic processes.

He is the co-author, along with Carol Brower Wilhelm, of the 1993 book The Permanence and Care of Color Photographs: Traditional and Digital Color Prints, Color Negatives, Slides, and Motion Pictures. They are the founders of company Wilhelm Imaging Research.

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👉 Henry Wilhelm in the context of Ilfochrome

Ilfochrome (also commonly known as Cibachrome) is a dye destruction positive-to-positive photographic process used for the reproduction of film transparencies on photographic paper. The prints are made on a dimensionally stable polyester base as opposed to traditional paper base. Since it uses 13 layers of azo dyes sealed in a polyester base, the print will not fade, discolour, or deteriorate for an extended time. Accelerated aging tests conducted by Henry Wilhelm rated the process as producing prints which, framed under glass, would last for 29 years before color shifts could be detected. Characteristics of Ilfochrome prints are image clarity, color purity, and being an archival process able to produce critical accuracy to the original transparency.

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