Recent Examples on the WebThe Library of Congress owns another in platinum; the Metropolitan Museum of Art owns a version made in gum bichromate, another labor-intensive process resulting in an image that some liken to red chalk drawings.
Judith H. Dobrzynski, WSJ, 30 Apr. 2021 Mac Cosgrove-Davies prints the same image in various antique photographic formats, including cyanotype (or blueprint), oil, carbon and gum bichromate.
Mark Jenkins, Washington Post, 20 Dec. 2019
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