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• 1 2023-05-04T04:32:52-07:00 Color Guide for the Top Half of the Large Glass—an Artifact of the Pochoir Process—included in MoMA's Boîte-en-valise 4 plain 2023-06-20T13:53:58-07:00 In the pochoir process, artisans cut stencils in zinc foil corresponding to distinctly colored areas of an image, then carefully apply color through these stencils to a black-and-white collotype print of that image in accordance with the sequence of color-layers they have determined.¹ Because all the paintings that Duchamp intended to reproduce in this way resided with his patrons in America, the Arensbergs and Katherine Dreier, Duchamp traveled overseas to inspect each one and record detailed notes on its coloring that enabled him to produce a color guide for the pochoir artisans for each reproduction.² Some of these color guides counted among the “originals”—bonus items, usually artifacts of the reproductive process—that Duchamp included in each of the twenty-four boxes comprising his first, deluxe series, including this one, which he gifted to MoMA in 1943.³