Mario Scacheri (1898-1940,) who along with his wife Mabel wrote The Fun of Photography (1938) was among the earliest photographers to work with the dye-transfer color process.  In this early experiment, cyan, magenta, and yellow are introduced instead of red green and blue to create a full-color spectrum.  The absence of black creates purple where dark green should appear in this picture of carrots.  

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Carrots

Mario Scacheri, c. 1933
vintage dye-transfer print
7.5″ × 8″