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Staff member examining a photochrom print. Photochrom prints, also called Aäc, are ink-based images produced through "the direct photographic transfer of an original negative onto litho and chromographic printing plates." Hans Jakob Schmid (1856-1924), who worked for the Swiss firm Orell Füssli, invented the technique in the 1880s. Füssli published the prints through a company with the imprint Photochrom Zürich, later Photoglob Zürich. Other...