I bought and imported 2 ready-made boards from the States (New Traditions Panels), shown below. The first is baltic birch, sealed on the back with a triple coat of Polyurethane to keep the moisture out and minimize warping. The second is Dibond, a sturdy archival aluminum composite material made of two lightweight sheets with a thermal plastic core. Conservators recommend this panel because it's not supposed to warp.
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The second obstacle was getting the canopy installed above the objects to create the shadows I want. Once that was done, I was able to finish the cartoon. Although I could have drawn directly on the panel with paint, I wasn't entirely certain how I would end up positioning the drawing. And so a paper cartoon gave me a chance to make changes without consequences. In the end, I made the drawing vertical and chose new dimensions: 12" wide by 16" tall.
In the photo below, the red squares represent the "Frame". After I snapped the picture, I noticed that tape holding up the red cloth behind the tea pot had fallen off, so the cloth is flatter than it should be...
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As an experiment, I tried a different approach to transferring the cartoon to the panel. I first coated the paper with raw umber. The oil in the paint was soon absorbed, leaving only the pigment. I then positioned the cartoon over the panel and retraced the drawing with a knitting needle. The end result is below. It's cleaner than if I had used charcoal (the usual approach).
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